{"product_id":"6-piece-serrated-drill-bit-set-cobalt-tips-that-open-any-hole","title":"6-Piece Serrated Drill Bit Set — Cobalt Tips That Open Any Hole","description":"\u003cstyle\u003e\nhtml{scroll-behavior:smooth;}\n.vlr-adv{--vlr-ink:#1a1a1a;--vlr-soft:#6b6b6b;--vlr-line:#e8e6e2;--vlr-bg:#faf8f5;--vlr-accent:#c0492f;box-sizing:border-box;overflow-x:hidden;padding:0 16px;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--vlr-ink);max-width:680px;margin:0 auto;line-height:1.6;font-size:17px}\n.vlr-adv *{box-sizing:border-box}\n.vlr-adv img{width:100%;height:auto;border-radius:14px;display:block;margin:16px 0}\n.vlr-adv h1{font-size:27px;line-height:1.25;font-weight:800;margin:8px 0 6px}\n.vlr-adv h2{font-size:22px;line-height:1.3;font-weight:800;margin:28px 0 8px}\n.vlr-adv .byline{font-size:14px;color:var(--vlr-soft);border-bottom:1px solid var(--vlr-line);padding-bottom:14px;margin-bottom:18px}\n.vlr-adv .lead{font-size:19px}\n.vlr-adv .card{background:var(--vlr-bg);border:1px solid var(--vlr-line);border-radius:16px;padding:18px;margin:16px 0}\n.vlr-adv .num{display:inline-flex;width:30px;height:30px;border-radius:50%;background:var(--vlr-accent);color:#fff;font-weight:800;align-items:center;justify-content:center;margin-right:8px}\n.vlr-adv .quote{font-style:italic;color:var(--vlr-soft);border-left:3px solid var(--vlr-accent);padding-left:12px;margin-top:10px;font-size:15px}\n.vlr-adv .cta{display:block;text-align:center;background:var(--vlr-accent);color:#fff!important;font-weight:800;font-size:19px;text-decoration:none;padding:16px 22px;border-radius:40px;margin:22px 0;box-shadow:0 6px 18px rgba(192,73,47,.3)}\n.vlr-adv table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}\n.vlr-adv th,.vlr-adv td{border:1px solid var(--vlr-line);padding:10px;text-align:center;word-break:break-word}\n.vlr-adv th{background:var(--vlr-ink);color:#fff}\n.vlr-adv .col-ours{font-weight:700}\n.vlr-adv th.col-ours{background:#FF6B00;color:#fff}\n.vlr-adv td.col-ours{background:#707070;color:#fff}\n.vlr-adv .review{border:1px solid var(--vlr-line);border-radius:14px;padding:14px;margin:12px 0}\n.vlr-adv .stars{color:#f5a623;letter-spacing:2px}\n.vlr-adv .urgency{background:#fff4f1;border:1px dashed var(--vlr-accent);border-radius:12px;padding:12px;text-align:center;font-weight:700;color:var(--vlr-accent)}\n.vlr-adv .faq details{border-bottom:1px solid var(--vlr-line);padding:10px 0}\n.vlr-adv .faq summary{font-weight:700;cursor:pointer;padding:8px 0;list-style:none;display:flex;justify-content:space-between;align-items:center}\n.vlr-adv .faq summary::-webkit-details-marker{display:none}\n.vlr-adv .faq summary::after{content:'+';font-size:22px;color:var(--vlr-accent);font-weight:700;transition:transform .25s}\n.vlr-adv .faq details[open] summary::after{content:'−'}\n.vlr-adv .faq .answer{padding:4px 0 14px;color:var(--vlr-soft);line-height:1.55}\n.vlr-adv .disclaimer{font-size:12px;color:var(--vlr-soft);margin-top:18px}\n@media(max-width:480px){.vlr-adv{font-size:16px;padding:0 12px}.vlr-adv h1{font-size:24px}.vlr-adv h2{font-size:20px}}\n\u003c\/style\u003e\n\u003cdiv class=\"vlr-adv\"\u003e\n\u003ch1\u003eSix Serrated Drill Bits That Turn a Rough Hole Into a Clean One\u003c\/h1\u003e\n\u003cp style=\"font-size: 19px; color: #6b6b6b; margin: 0 0 10px;\"\u003eCobalt-grade tips that bite on contact, cut sideways, and reach sizes your round bits cannot.\u003c\/p\u003e\n\u003cp class=\"byline\"\u003eBy the Velloraco Workshop Team · 4 min read\u003c\/p\u003e\n\u003csection\u003e\n\u003cp class=\"lead\"\u003eYou drill a hole. It is the right position but the wrong size, and now you need it a little wider.\u003c\/p\u003e\n\u003cp class=\"lead\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/1_23306841-b00d-499a-9592-c9f5c3faa4a9.gif?v=1789979470\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eA standard bit will not open a hole sideways, so you reach for a file, or you step up through three more bits, or you start the whole thing again an inch over. Plywood splinters on the exit. The bit wanders off your pencil mark before it bites. And the cheap set you bought last year has two bent bits and one that has gone dull enough to burn the wood instead of cutting it. That is the part nobody warns you about: it is rarely the drilling that wastes your afternoon. It is the fixing afterwards.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/1_5c083bcd-45bd-4752-869e-b82cdb365a23.jpg?v=1789979564\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eWhy These Bits Cut Instead of Skid\u003c\/h2\u003e\n\u003cp\u003eMost inexpensive sets are made from standard high-speed steel with a plain ground point. The edge is sharp on day one and soft on day thirty, and the tip tends to slide across the surface until it finds a groove of its own choosing.\u003c\/p\u003e\n\u003cp\u003eThis six-piece set works differently in three specific ways.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/2_fbc7d0f5-24d9-4410-84a2-37a1efc5e57b.gif?v=1789979489\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe point is split.\u003c\/strong\u003e A 135° split point creates two cutting edges that meet at the centre, so the bit starts cutting the moment it touches the surface. That is what stops the walking you get from a standard tip, and it means you do not have to punch a starter dent first.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe flutes are serrated.\u003c\/strong\u003e Instead of a smooth spiral, the cutting edges carry fine teeth down the length of the flute. Those teeth let the bit enlarge a hole sideways rather than only straight down, and they break the waste material into small chips that clear out of the way instead of packing the flutes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe surface is titanium coated.\u003c\/strong\u003e The gold coating holds the cutting edge a little longer and gives the chips somewhere slick to slide off, which keeps friction and heat down on longer runs.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/2_fe5b7eef-beb6-4f6b-9bd5-4579407614ed.jpg?v=1789979587\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eThree Reasons This Set Earns Its Space in the Box\u003c\/h2\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cp\u003e\u003cspan class=\"num\"\u003e1\u003c\/span\u003e\u003cstrong\u003eIt fixes the hole you already made.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is the whole point of a serrated bit. You bore your pilot hole, discover the fitting needs an extra millimetre, and instead of starting over you run the next size through the same hole and open it up on the spot. The six sizes step from roughly 3mm to 10mm, so you can work upward in small increments and stop exactly where the part fits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cp\u003e\u003cspan class=\"num\"\u003e2\u003c\/span\u003e\u003cstrong\u003eOne box covers wood, metal and plastic.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe cobalt-grade steel and the split point are built for more than pine. These bits will take on hardwood, sheet metal, stainless steel, plastic and light masonry work, which means fewer trips back to the shelf to hunt for a second set. For anyone doing repairs and small builds around the house, that range is the difference between a finished job and a job that waits until the right bit arrives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"card\"\u003e\n\u003cp\u003e\u003cspan class=\"num\"\u003e3\u003c\/span\u003e\u003cstrong\u003eThe kit is honest about weight.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese bits have real heft in the hand, and that weight is doing work for you. A heavier bit with a round 6mm shank sits steadier in the chuck, transfers your pressure straight into the cut, and gives you more control when you are working at an awkward angle or pushing sideways to open a hole. It reads as confidence instead of flex, and it makes a genuinely tedious task feel like something you can steer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/3_12a96e8c-9ffc-46a0-a75d-48a267465218.webp?v=1789979510\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eWho This Set Is Built For\u003c\/h2\u003e\n\u003cp\u003eIt suits anyone who repairs and builds rather than drills once a year. If you fit door hardware, hang shelving, work on a boat or trailer, patch furniture, mount brackets into masonry, or keep a workshop where something always needs a hole made bigger, this set belongs within arm's reach.\u003c\/p\u003e\n\u003cp\u003eIt also suits the person who has a drawer full of blunt and bent bits and keeps meaning to replace them properly. One organised set with a clear size range beats eight loose bits of unknown origin.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/3_b6d0efd0-f824-45a9-be57-e08588975e5c.jpg?v=1789979603\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eSerrated vs Standard Drill Bits\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat Matters\u003c\/th\u003e\n\u003cth class=\"col-ours\"\u003eThis Six-Piece Set\u003c\/th\u003e\n\u003cth\u003eTypical Round Bit Set\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStarting the hole\u003c\/td\u003e\n\u003ctd class=\"col-ours\"\u003e135° split point bites on contact — no starter punch needed\u003c\/td\u003e\n\u003ctd\u003ePlain point slides until it finds grip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnlarging a hole\u003c\/td\u003e\n\u003ctd class=\"col-ours\"\u003eSerrated flutes cut sideways to open an existing hole\u003c\/td\u003e\n\u003ctd\u003eCannot open a hole sideways — start over or file by hand\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat and friction\u003c\/td\u003e\n\u003ctd class=\"col-ours\"\u003eTitanium coating keeps the edge running cooler\u003c\/td\u003e\n\u003ctd\u003eBare steel dulls and burns the workpiece\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd class=\"col-ours\"\u003eWood, metal, stainless steel, plastic, light masonry\u003c\/td\u003e\n\u003ctd\u003eUsually fine on softwood only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShank fit\u003c\/td\u003e\n\u003ctd class=\"col-ours\"\u003eRound 6mm shank seats firmly in a standard chuck\u003c\/td\u003e\n\u003ctd\u003eVariable, often slips under load\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage\u003c\/td\u003e\n\u003ctd class=\"col-ours\"\u003eSix sizes in one blister pack, sorted and together\u003c\/td\u003e\n\u003ctd\u003eLoose bits, sizes unknown\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/4_c3382030-752e-403f-a949-612c294ed8d1.jpg?v=1789979615\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eWhat People Say After Using Them\u003c\/h2\u003e\n\u003cdiv class=\"review\"\u003e\n\u003cp class=\"stars\"\u003e★★★★★\u003c\/p\u003e\n\u003cp\u003eUsed them on 18mm plywood over a weekend and they opened up holes neatly without swapping tools or reaching for a file. They bite well, clear the waste quickly, and feel far more controlled than forcing a normal bit sideways. The spread of sizes is handy because you can start small and work up until the fit is right.\u003c\/p\u003e\n\u003cp class=\"quote\"\u003eAndy M.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review\"\u003e\n\u003cp class=\"stars\"\u003e★★★★★\u003c\/p\u003e\n\u003cp\u003eBought these because the old ones in the drawer had gone brittle and most of them had snapped. The quality on these is genuinely good and they carry a nice weight, which makes them easier to use than the thin ones.\u003c\/p\u003e\n\u003cp class=\"quote\"\u003eBukhari C.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"review\"\u003e\n\u003cp class=\"stars\"\u003e★★★★★\u003c\/p\u003e\n\u003cp\u003eUsed mainly on wood and thin metal sections and got clean, even holes. The cut is precise and the bits enter the material without much fuss, especially at a sensible speed and moderate pressure. After several uses there was no obvious distortion and no real loss of sharpness.\u003c\/p\u003e\n\u003cp class=\"quote\"\u003eMary S.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe one note worth passing on: they arrive in a packet, so wipe them down before you set them on a clean surface. That is packaging, not the tools.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003ca class=\"cta\" href=\"#\"\u003eOpen Up That Hole Properly — Get the Six-Piece Set\u003c\/a\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/5_8f69934c-dc36-45b3-a024-216de4d4eada.jpg?v=1789979649\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eHow to Use Them\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSet the bit.\u003c\/strong\u003e Slide the round 6mm shank into a standard chuck and tighten it down firmly. The round shank seats evenly, so you should not need to fight it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStart at the size below your target.\u003c\/strong\u003e Begin with a smaller bit to establish the hole, then step up through the sizes until the fitting passes through the way you want.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLet the teeth work.\u003c\/strong\u003e Run a moderate speed with steady, even pressure. These bits cut as they turn, so leaning on the drill harder does not speed things up — it just heats the edge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eClear the chips.\u003c\/strong\u003e Back the bit out periodically to let the swarf out of the flutes. Clean flutes cut faster than packed ones.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWork up in small steps.\u003c\/strong\u003e Opening a hole by one size at a time keeps the cut round and controlled. Jumping several sizes at once is how holes go oval.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDrill through into scrap.\u003c\/strong\u003e Put a piece of waste timber behind the workpiece when you can. It supports the fibres on the exit side and saves you the splintered edge.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/6_7f7d43c5-201d-4fd7-bc4b-c7121bfa2b66.jpg?v=1789979661\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq\"\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat sizes are in the set?\u003c\/summary\u003e\n\u003cdiv class=\"answer\"\u003eSix bits covering a cutting range of roughly 3mm to 10mm, supplied as one six-piece set. That spread lets you step up in small increments rather than jumping between distant sizes.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these fit my drill?\u003c\/summary\u003e\n\u003cdiv class=\"answer\"\u003eThey use a round 6mm shank, which fits standard drill chucks. If your drill accepts round-shank bits in that size, these will seat properly.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan they really cut sideways?\u003c\/summary\u003e\n\u003cdiv class=\"answer\"\u003eThat is what the serrated flutes are for. Once you have a pilot hole, a serrated bit can enlarge it sideways rather than only boring straight down, which is why they are useful for fitting work where the hole needs to grow by a millimetre or two.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat materials can I use them on?\u003c\/summary\u003e\n\u003cdiv class=\"answer\"\u003eWood, metal, stainless steel, plastic and light masonry. For harder materials, run a slower speed and keep the pressure light and even. Going in gently always beats forcing it.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDo I need to centre-punch first?\u003c\/summary\u003e\n\u003cdiv class=\"answer\"\u003eWith a standard point you often do, because the tip slides before it bites. The 135° split point on these bits is designed to start cutting on contact, so in most materials you can skip that step.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I keep them cutting well?\u003c\/summary\u003e\n\u003cdiv class=\"answer\"\u003eKeep the speed moderate, clear the chips as you go, and store them so the edges are not knocking against each other. Treated sensibly, a set like this stays useful far longer than the loose bits most people have in a drawer.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/7_ae530abc-aafe-4b1f-8d80-637eb96a077f.jpg?v=1789979721\" alt=\"\"\u003e\u003c\/h2\u003e\n\u003ch2\u003eThe Hole You Already Drilled Is Not a Mistake\u003c\/h2\u003e\n\u003cp\u003eIt just needs to be a bit bigger. That is the whole idea behind this set: six titanium-coated bits with serrated flutes and split points, sized to step up gradually so you can open an existing hole instead of abandoning it. They cut sideways, start without walking, and handle wood, metal, stainless steel and plastic from the same box.\u003c\/p\u003e\n\u003cp\u003eIf the bits in your drawer are bent, blunt, or unknown sizes, this replaces all of it in one go — and gives you the one capability a round bit set never had. Stock on this six-piece set moves in batches, and the current batch is in stock now.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\u003ca class=\"cta\" href=\"#\"\u003eReplace the Drawer of Blunt Bits — Order the 6-Piece Set\u003c\/a\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Velloraco","offers":[{"title":"6-Piece Set (3-10mm)","offer_id":50568090550520,"sku":"LXA184-6PC","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0821\/2892\/9016\/files\/01_e962e23e-98f0-4eba-b574-c2b36b23612e.jpg?v=1790043950","url":"https:\/\/velloraco.com\/products\/6-piece-serrated-drill-bit-set-cobalt-tips-that-open-any-hole","provider":"Velloraco","version":"1.0","type":"link"}