--- product_id: 285838342 title: "M42 8％ Cobalt Twist Drill Bits (12mm x 2PCS) for Stainless Steel and Hard Metal" brand: "stroton" price: "NT$1016" currency: TWD in_stock: true category: "Stroton" url: https://www.desertcart.tw/products/285838342-m42-8-cobalt-twist-drill-bits-12mm-x-2pcs-stainless store_origin: TW region: Taiwan --- # 3-step tip design for faster, precise drilling 68-70 HRC Rockwell Hardness for superior heat resistance M42 8% Cobalt Steel for ultimate durability M42 8％ Cobalt Twist Drill Bits (12mm x 2PCS) for Stainless Steel and Hard Metal **Brand:** stroton **Price:** NT$1016 **Availability:** ✅ In Stock ## Summary > ⚡ Drill Like a Pro, Last Like a Legend ## Quick Answers - **What is this?** M42 8％ Cobalt Twist Drill Bits (12mm x 2PCS) for Stainless Steel and Hard Metal by stroton - **How much does it cost?** NT$1016 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/285838342-m42-8-cobalt-twist-drill-bits-12mm-x-2pcs-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 - • **Built to Last:** Premium M42 cobalt steel delivers unmatched heat, wear, and chip resistance for extended tool life. - • **Precision Meets Power:** 135° split point eliminates walking for clean, immediate starts every time. - • **Versatile Performance:** Engineered to cut through stainless steel, hard metals, aluminum, plastic, and hardwood with ease. - • **Speed Without Sacrifice:** Drill 3-5x faster through stainless steel and hard metals, saving time and effort. - • **Cost-Effective Excellence:** Higher upfront cost but lowest cost per hole thanks to durability and efficiency—work smarter, not harder. ## Overview The M42 8% Cobalt Twist Drill Bits (12mm, 2pcs) combine premium cobalt steel with a 135° split point and a 3-step tip design to deliver superior heat resistance, durability, and precision. Engineered for stainless steel and hard metals, these bits drill 3-5 times faster than standard bits, offering long tool life and cost efficiency for professional-grade performance. ## Description Product Advantages: (1) 3 Steps desigh 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 M42 metric 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 ____________________________ ≤5mm 1000~700 ____________________________ 5-10mm 700~350 ____________________________ 10-15mm 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 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 Desigh 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. - 2Pcs 135 Degree Split Point Drill Bits Includes :12mm(length:15.1cm)x2 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B081Z8GW47 | | ASIN | B081Z8GW47 | | Best Sellers Rank | #16,575 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #27 in Jobber Drill Bits | | Brand Name | STROTON | | Customer Reviews | 4.4 4.4 out of 5 stars (4,692) | | Customer reviews | 4.4 4.4 out of 5 stars (4,692) | | Cutting Angle String | 135 Degrees | | Cutting Diameter | 12 Millimeters | | Date First Available | 13 January 2021 | | Finish Types | Hardened | | Is Discontinued By Manufacturer | No | | Item Weight | 1 Pounds | | Item model number | M42 Cobalt-8 | | Manufacturer | WnewTools Ltd | | Manufacturer | WnewTools Ltd | | Material Type | Cobalt | | Model | M42 Cobalt-8 | | Number of Flutes | 2 | | Number of Pieces | 2 | | Package Dimensions | 18.29 x 10.16 x 2.03 cm; 453.59 g | | Part Number | M42 Cobalt-8 | | Set Name | 2-Piece Set | | Shank Type | Straight | | Surface Recommendation | Wood | | Tool Flute Type | Spiral | | UPC | 630808641305 | | Unit Count | 2 Count | ## Product Details - **Cutting angle string:** 135 Degrees - **Cutting diameter:** 12 Millimeters - **Finish type:** Hardened - **Material:** Cobalt - **Shank type:** Straight ## Images ![M42 8％ Cobalt Twist Drill Bits (12mm x 2PCS) for Stainless Steel and Hard Metal - Image 1](https://m.media-amazon.com/images/I/51soMoU3ZcL.jpg) ## Available Options This product comes in different **Pattern** options. ## Frequently Bought Together - STROTON 12mm x 2pcs M42 8％ Cobalt Drill Bits for Stainless Steel and Hard Metal - Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size - Forney 20857 Tap Magic Industrial Pro Cutting Fluid, 4 oz --- ## 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.tw/products/285838342-m42-8-cobalt-twist-drill-bits-12mm-x-2pcs-stainless](https://www.desertcart.tw/products/285838342-m42-8-cobalt-twist-drill-bits-12mm-x-2pcs-stainless) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-10-11*