--- product_id: 509326613 title: "Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood" brand: "stroton" price: "₱2908" currency: PHP in_stock: true reviews_count: 13 category: "Stroton" url: https://www.desertcart.ph/products/509326613-cobalt-drill-bit-set-1-16-1-4-inch-13pcs store_origin: PH region: Philippines --- # 3X Heat & Wear Resistance for heavy-duty M35 5% Cobalt Steel - 68 HRC ultra-hard Split Point Design - precise, no walking Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood **Brand:** stroton **Price:** ₱2908 **Availability:** ✅ In Stock ## Summary > ⚡ Drill Like a Pro, Last Like a Legend ## Quick Answers - **What is this?** Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood by stroton - **How much does it cost?** ₱2908 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/509326613-cobalt-drill-bit-set-1-16-1-4-inch-13pcs) ## Best For - stroton enthusiasts ## Why This Product - Trusted stroton brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Engineering:** Split point tip ensures immediate bite and zero walking on tough metals. - • **Versatile 13-Piece Set:** Covers 1/16 to 1/4 inch diameters in 1/64 increments—perfect for stainless steel, cast iron, hardwood, and plastics. - • **Premium M35 Cobalt Alloy:** Crafted from 5% cobalt steel mined in-house for superior heat and wear resistance. - • **Industrial-Grade Performance:** Handles the toughest materials like hardened steel and bolts with ease—your go-to for professional-grade projects. - • **Unmatched Durability & Speed:** 3X faster drilling with 3X longer tool life—work smarter, not harder. ## Overview The STROTON Cobalt Drill Bit Set features 13 precision-engineered M35 high-speed steel bits with 5% cobalt, delivering 3X the heat resistance, wear resistance, and tool life compared to standard bits. Designed with a split point tip for immediate, accurate drilling, this set excels on stainless steel, cast iron, hardwood, and plastics. Ideal for professionals and serious DIYers seeking unmatched durability and efficiency in heavy-duty drilling tasks. ## Description Product Description Why Choose Premium STROTON Cobalt Drill Bits? Researches have shown that compared with HSS without cobalt, HSS with cobalt has higher temperature resistance, red hardness, wear resistance and heat treatment response. Red hardness, which means that the drill bits hardened steel can maintain hard at 860-880℃ . 68 HRC,it means that the drill bits has 3X cutting ability and 3X durability. This drill bits set is made of True Premium Cobalt (80,000 dollars per ton). Truly Made of 5% Cobalt Alloy Steel This drill bits set definitely have more cobalt in them than the "Cobalt" bits that HF sells--which are just Cobalt coated or only a tiny amount of cobalt tipped. Compared with ordinary high speed steel, 5% cobalt provides better heat and wear resistance,and Hold up Better. 3X Drilling Efficiency + 3X Tool Life Split Point desigh tip starts drilling immediately with less force and eliminates "walking" across the work surface. Ideal for Stainless steel,Mild Steel,Iron,Hardmetal,Aluminum,Copper,Plastic and Hardwood. The drill bit can be used for mechanical maintenance, such as drilling out bolts and screws. Be vertical to the workpiece Non-vertical use may cause the drill bit to break. Using a drill press with sufficient power will make drilling easier. Low speed: 200 to 1000 RPM Too high speed may burn the bit tip. Drill diameter≤3/16，RPM（1000~700） 3/16-3/8，RPM（700~350） 3/8-1/2，RPM（350~200） Use cutting fluid Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating. It also works adding some vinegar,soy sauce or water. Remain steady and patient The drilling shall be started slowly by applying force slowly and gently until the drill bit starts chipping. STROTON Ture Cobalt Steel Products for Stainless Steel, Hard Metal, and Wood. 1/16-1/4 Inch (13PCS) 1mm-10mm (19PCS) 1/16-1/2 Inch (17PCS) 4mm-32mm (15 Steps) Metric Small packaged Review: good hobby item - Very durable Review: great drill bits - excellent drill bits, worked really well drilling some stainless steel. definitely worth while purchase. ## Features - 【Premium M35 5% Cobalt Steel with 68 HRC】- Made from Cobalt Ore from Our Own Mine, Usually Give the 3X Heat,Wear and Chip Resistance and 3X Tool Life. - 【Split Point Design and Fully Ground Process】- Compared with Other Ordinary Drill Bits, This Drill Bits Set is Particularly Suitable for Heavy Duty Work, Such as Cutting through Stainless Steel,Steel Plate,Iron Sheet, Cast Iron and Hardwood, and Drilling Out Bolts Studs and Screws. - 【3X Efficiency + 3X Tool Life】- This Cobalt High Speed Steel Drill Bits Set is Typically Capable of Running 3 Times Faster. Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes. - 【Sharp Drill Bit Edge】- This Kind of Drill Bits Beast Can Even Cut Hardened Metal into Long Iron Bars, While a Dull Drill Bit Can Just Slowly Wear Through Metal. - 【13 Pieces Jobber Length Industrial Drill Bits Includes】:1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4 [DIA 1/64 Inch Increments] ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BNCKB8DR | | Best Sellers Rank | 14,708 in DIY & Tools ( See Top 100 in DIY & Tools ) 95 in Drill Bit Sets | | Brand | STROTON | | Country Of Origin | China | | Customer Reviews | 4.5 out of 5 stars 949 Reviews | | Cutting Angle String | 135 Degrees | | Cutting Diameter | 0.25 Inches | | Cutting angle string | 135 Degrees | | Cutting diameter | 0.25 Inches | | Finish Types | High Speed Steel,Stainless Steel | | Finish type | High Speed Steel, Stainless Steel | | Included Components | Cobalt Drill Bits and Case | | Item Dimensions | 17.8 x 7.6 x 1.8 centimetres | | Manufacturer | STROTON Ltd | | Manufacturer Part Number | M35-Co5-inch-S | | Material | Cobalt Cobalt Steel | | Minimum Bore Diameter | 0.06 Inches | | Model Number | M35-Co5-inch-S | | Number of Flutes | 2 | | Number of Packs | 1 | | Number of Pieces | 13 | | Point Style | Split Point | | Set Name | STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS) | | Shank Type | 3-Flat | | Shank type | 3-Flat | | Surface Recommendation | Cutting Stainless Steel, Cast Iron, Copper,Aluminum, Plastic, Hardwood | | Tool Flute Type | Spiral | | UPC | 630808641718 | | Unit Count | 1.0 count | ## Product Details - **Cutting angle string:** 135 Degrees - **Cutting diameter:** 0.25 Inches - **Finish type:** High Speed Steel,Stainless Steel - **Material:** Cobalt Cobalt Steel - **Shank type:** 3-Flat ## Images ![Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Image 1](https://m.media-amazon.com/images/I/71dpcqd-McL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ good hobby item *by R***. on 29 July 2026* Very durable ### ⭐⭐⭐⭐⭐ great drill bits *by D***D on 22 February 2026* excellent drill bits, worked really well drilling some stainless steel. definitely worth while purchase. ### ⭐⭐⭐⭐ Fine but easily snapped. *by D***D on 23 March 2026* These worked fine for a one time job of drilling into a lock, but they all broke at the tip. This added to the time for the job as the tip then had to be retrieved in order that it wasn't an obstruction. My advice, if you are using these for metal, buy a pair of fine straight tweezers at the same time, to get the broken tip out quickly. ## Frequently Bought Together - STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size - NordWolf 5-Piece M35 Cobalt Stubby Drill Bit Set for Stainless Steel & Hard Metals, with 1/4" Hex Shank for Quick Chucks & Impact Drivers, SAE Sizes 3/32"-1/8"-3/16"-1/4"-5/16" in Storage Case --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ph/products/509326613-cobalt-drill-bit-set-1-16-1-4-inch-13pcs](https://www.desertcart.ph/products/509326613-cobalt-drill-bit-set-1-16-1-4-inch-13pcs) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-08-19*