--- product_id: 206579455 title: "Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)" brand: "stroton" price: "£66.78" currency: GBP in_stock: true category: "Stroton" url: https://www.desertcart.co.uk/products/206579455-metric-m42-8-cobalt-twist-drill-bits-set-for-stainless store_origin: GB region: United Kingdom --- # 68-70 HRC Rockwell Hardness - extreme heat resistance 3-Step Split Point Design - 3-5x faster drilling M42 8% Cobalt Steel - premium durability Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) **Brand:** stroton **Price:** £66.78 **Availability:** ✅ In Stock ## Summary > ⚡ Drill Smarter, Not Harder — The Ultimate Cobalt Powerhouse ## Quick Answers - **What is this?** Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) by stroton - **How much does it cost?** £66.78 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/206579455-metric-m42-8-cobalt-twist-drill-bits-set-for-stainless) ## 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 & Speed:** Innovative 3-step split point tip ensures immediate bite and up to 5x faster drilling with less walking. - • **Complete Size Range:** 19-piece set from 1mm to 10mm in 0.5mm increments covers every professional drilling need. - • **Unmatched Durability:** Crafted from premium M42 cobalt steel with 8% cobalt for superior wear and heat resistance. - • **Versatile Performance:** Engineered for stainless steel, hard metals, aluminum, plastics, and hardwood with flawless precision. - • **Cost-Effective Longevity:** Despite premium price, lower cost per hole thanks to extended tool life and consistent cutting efficiency. ## Overview The STROTON Metric M42 8% Cobalt Twist Drill Bits Set features 19 precision-engineered bits ranging from 1mm to 10mm, crafted from premium M42 cobalt steel with 68-70 HRC hardness. Designed with a 3-step split point tip, these bits deliver 3 to 5 times faster drilling and exceptional heat and wear resistance, making them ideal for stainless steel, hard metals, aluminum, plastics, and hardwood. This set offers professional-grade durability and precision, ensuring a lower cost per hole and long-lasting performance for demanding metalworking and woodworking tasks. ## Description Premium M42 8% cobalt steel drill bits with 68-70 HRC deliver exceptional heat, wear, and chip resistance for faster, longer-lasting drilling through tough materials. ## Features - Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life. - 3 Steps Design for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic. - This Cobalt Drill Bit is Typically Capable of Running Three to Five 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 Throng the Material with a Blunt Drill Bit. - 19Pcs 135 Degree Split Point Drill Bits Includes :1mm(length:3.4cm) 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm(length:8.5cm) 5.5mm 6mm(length:9cm) 6.5mm 7mm 7.5mm 8mm(length:11.5cm) 8.5mm 9mm 9.5mm 10mm(length:13cm) [DIA 0.5mm Increments] . ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07MZQMPMC | | Best Sellers Rank | 1,522 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2 in Metalworking & Multi-Purpose Drill Bit Sets | | Brand | STROTON | | Country Of Origin | China | | Customer Reviews | 4.3 4.3 out of 5 stars (4,772) | | Cutting Angle String | 90 Degrees | | Cutting Diameter | 10 Millimetres | | Finish Types | Uncoated | | Item Weight | 454 g | | Manufacturer | STROTON | | Manufacturer Part Number | M42 Cobalt-8(19pcs) | | Material | Cobalt | | Minimum Bore Diameter | 1 Millimetres | | Number of Flutes | 2 | | Number of Packs | 1 | | Number of Pieces | 19 | | Point Style | Split Point | | Set Name | 1-10mm (19PCS) | | Shank Type | Straight | | Surface Recommendation | Stainless Steel, Hard Metal, Hardwood, Aluminum, Plastic | | Tool Flute Type | Spiral | | UPC | 743829466298 | | Unit Count | 1 count | ## Product Details - **Cutting angle string:** 90 Degrees - **Cutting diameter:** 10 Millimetres - **Finish type:** Uncoated - **Material:** Cobalt - **Shank type:** Straight ## Images ![Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) - Image 1](https://m.media-amazon.com/images/I/71YyLQiGN8L.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can these drill through a car's trunk without any issues?** A: These are made to drill through thick hard steel. Thus are very hard and brittle and will break easily if improper angle is applied. For drilling trunk or locks use a titanium bit and buy a few of them as they dull quick but get the job done. **Q: Bought the 19 pc set; 3mm but broke immediately. Can anyone point me to where I can buy replacement? Thank you.** A: Hi,I am the seller. You need to click the blue word [STROTON] in "Sold by STROTON and Fulfilled by Amazon" below the "Add to Cart" of this Drill bit's listing. Then click [Ask a question] that write the condtion simply to Establish contact channels with me through Amazon message system. Then I can handle the follow-up to your order. Best regards STROTON **Q: Can they drill titanium** A: Honestly,They are good for drilling steel and do the job well. But Titanium alloy has very high hardness. And We can't guarantee. If it doesn't work well, you could return it. If it works（Lubricant Must Be Used）, you could share it with other customers. **Q: What is the length of these bits?** A: They are average lengths. The 1mm is 3.4cm and length increase proportionally to the 10mm which is 5.4cm. ## Frequently Bought Together - Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) - Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size - MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box --- ## 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/206579455-metric-m42-8-cobalt-twist-drill-bits-set-for-stainless](https://www.desertcart.co.uk/products/206579455-metric-m42-8-cobalt-twist-drill-bits-set-for-stainless) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-10-23*