--- product_id: 436854092 title: "Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood" brand: "stroton" price: "£40.70" currency: GBP in_stock: true category: "Stroton" url: https://www.desertcart.co.uk/products/436854092-cobalt-drill-bit-set-1-16-1-2-inch-17pcs store_origin: GB region: United Kingdom --- # 68 HRC Rockwell Hardness for superior heat resistance Runs 2-3x faster than standard drill bits 5% Premium Cobalt Steel for extreme durability Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood **Brand:** stroton **Price:** £40.70 **Availability:** ✅ In Stock ## Summary > ⚡ Drill Like a Pro, Last Like a Legend ## Quick Answers - **What is this?** Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood by stroton - **How much does it cost?** £40.70 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/436854092-cobalt-drill-bit-set-1-16-1-2-inch-17pcs) ## 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 - • **Pro Tips Included:** Optimized RPM guidelines and lubrication hacks for stainless steel mastery - • **Cost-Effective Longevity:** Drill more holes with fewer bit changes—lowest cost per hole in its class - • **Versatile 17-Piece Range:** From 1/16 to 1/2 inch, perfect for metals, plastics, and wood - • **Precision Split Point Tip:** Starts drilling instantly with zero walking for flawless accuracy - • **Unmatched Heat & Wear Resistance:** 5% cobalt alloy keeps bits cooler and sharper under pressure ## Overview The Cobalt Drill Bit Set features 17 precision-engineered bits made from premium 5% cobalt high-speed steel, delivering exceptional hardness (68 HRC) and heat resistance. Designed for professional-grade drilling through stainless steel, hardened metals, plastics, and wood, these bits run 2-3 times faster than standard sets, ensuring longer tool life and superior performance. Ideal for millennial managers who demand efficiency and reliability in their toolkit. ## Description Product Advantages: (1) Split Point Design tip starts drilling immediately with less force and eliminates "walking" across the work surface. (2) Holds up better than generic high-speed steel,Cobalt gives high-speed steel more heat and wear resistance. (3) This drill bits set is made of Premium Cobalt (80,000 dollars per ton).(4) The 5% cobalt drill bits can cut through Stainless steel and Hard metal,Hard wood, although they can be used for softer materials such as Aluminum,Plastic. Some Important Tips about drilling stainless steel and hard metal: (1)Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel. ________________________________ Stainless Steel ____________________________ Drill diameter RPM ____________________________ ≤3/16" 1000~700 ____________________________ 3/16"-3/8" 700~350 ____________________________ 3/8"-1/2" 350~200 ________________________________ (2)Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce or water if you don't have engine oil. ## Features - Premium 5% Cobalt Steel ,68 HRC (Rockwell Hardness Scale) ,the Cobalt Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life. - The Cutting Edge has been Ground Three Times and is made of Cobalt Steel, which has High Hardness and Heat Resistance. It is Designed for Drilling through Stainless Steel, Hardened Steel, Iron, Aluminum, Pipes, Wood, PVC, and Plastics. - This Heavy Duty Work Cobalt Drill Bit is Typically Capable of Running Two to Three 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. - The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Through the Material with a Blunt Drill Bit. - 17Pcs 135 Degree Cobalt Industrial Hss Drill Bits Kit Includes :1/16 (2pcs), 5/64, 3/32 (2pcs), 7/64, 1/8 (2pcs), 9/64, 5/32, 3/16, 7/32, 1/4 (2pcs), 5/16, 3/8, 1/2 . ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09MRW8399 | | ASIN | B09MRW8399 | | Best Sellers Rank | #163,204 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #666 in Power Drill Bit Sets | | Brand Name | STROTON | | Customer Reviews | 4.5 4.5 out of 5 stars (519) | | Customer reviews | 4.5 4.5 out of 5 stars (519) | | Cutting Angle String | 135 Degrees | | Cutting Diameter | 0.5 Inches | | Date First Available | 24 April 2022 | | Finish Types | High Speed Steel,Stainless Steel | | Item Dimensions | 18 x 13 x 4 centimeters | | Item model number | Cobalt 6 series bits inch 1/16-1/2 | | Manufacturer | STROTON Ltd | | Manufacturer | STROTON Ltd | | Material Type | Cobalt | | Minimum Bore Diameter | 0.06 Inches | | Model | Cobalt 6 series bits inch 1/16-1/2 | | Number of Flutes | 2 | | Number of Pieces | 17 | | Part Number | Cobalt 6 series bits inch 1/16-1/2 | | Point Style | Split Point | | Product Dimensions | 18 x 13 x 4 cm; 516 g | | Set Name | 17-Piece Set | | Shank Type | (1/16-7/32: Round Shank) (1/4-1/2: 3-Flat Shank) | | Surface Recommendation | Metal, Plastic, Wood | | Tool Flute Type | Spiral | | UPC | 643459994935 | | Unit Count | 1 Count | ## Product Details - **Cutting angle string:** 135 Degrees - **Cutting diameter:** 0.5 Inches - **Finish type:** High Speed Steel,Stainless Steel - **Material:** Cobalt - **Shank type:** (1/16-7/32: Round Shank) (1/4-1/2: 3-Flat Shank) ## Images ![Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), 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/81nznZfGTrL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Are these good for make holes in steel material?** A: Yes，good for drilling steel.Generally, sellers purchase products from the market and sell them on e-commerce platforms. The STROTON drill bits we sell are designed and produced by our factory, including the case, which is unique on the market. This drill bit contains 6% cobalt, which is higher than general products. In addition, STROTON hss drill bits have a secret heat treatment recipe.So They’re good at drilling steel. **Q: Where are these made?** A: They are made in China. They are very good cobalt drill bits set.It is designed and manufactured by STROTON, different from the similar products in the market. ## Frequently Bought Together - STROTON Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - amoolo 3/8" Cobalt Drill Bit(5Pcs), M35 HSS Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron - BECOLLO 1/4 Inch Cobalt Drill Bit Set, M35 Jobber Length Twist Drill Bits,Suitable for Drilling in Hard Metal, Stainless Steel, Cast Iron,10 Pieces --- ## 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.co.uk/products/436854092-cobalt-drill-bit-set-1-16-1-2-inch-17pcs](https://www.desertcart.co.uk/products/436854092-cobalt-drill-bit-set-1-16-1-2-inch-17pcs) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-23*