--- product_id: 504339297 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: "135 zł" currency: PLN in_stock: true reviews_count: 13 category: "Stroton" url: https://www.desertcart.pl/products/504339297-cobalt-drill-bit-set-1-16-1-4-inch-13pcs store_origin: PL region: Poland --- # 68 HRC hardness for extreme heat resistance 3X faster drilling efficiency 5% pure cobalt steel for 3X durability 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:** 135 zł **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?** 135 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/504339297-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 - • **Unmatched Durability:** Crafted from genuine 5% cobalt ore for triple the wear and heat resistance. - • **Precision Engineering:** Split point design and fully ground edges ensure effortless penetration through the toughest metals. - • **Maximized Productivity:** Drill up to 3X faster with longer tool life, reducing your cost per hole dramatically. - • **Versatile 13-Piece Set:** Covers 1/16 to 1/4 inch in 1/64 increments—perfect for stainless steel, cast iron, hardwood, and plastics. - • **Industrial-Grade Performance:** Sharp edges cut hardened metals and bolts with ease, making it the go-to for heavy-duty projects. ## Overview The STROTON Cobalt Drill Bit Set features 13 precision-engineered M35 high-speed steel bits with 5% genuine cobalt content, delivering 3X the heat resistance, wear durability, and drilling speed. Designed for professionals tackling stainless steel, cast iron, hardwood, and plastics, this set offers industrial-grade performance with a sharp split point design and fully ground edges, ensuring clean, efficient holes every time. ## 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. Review: Good quality drill bits - I am grateful for purchasing this product. I keep it inside of my drill bag. They work great on several surfaces. Review: Good Bits - Good bit's,they cut well ## Features - 【Premium True 5% Cobalt Steel with 68 HRC】- The Marked Cobalt Content of Ordinary Drill Bits May be False, but This Drill Bits Set is Made of Cobalt Ore from Our Own Mine, Which Indeed Contains 5% Cobalt. Although the Cost and Price are Slightly Higher, It Usually is able to Provide 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 | #25,352 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #24 in Wood Drill Bit Sets #556 in Drill Bits | | Brand | STROTON | | Brand Name | STROTON | | Customer Reviews | 4.4 out of 5 stars 928 Reviews | | Cutting Angle String | 135 Degrees | | Finish Type | Hardened | | Finish Types | Hardened | | Included Components | Cobalt Drill Bits and Case | | Item Dimensions | 7 x 3 x 0.69 inches | | Item dimensions L x W x H | 7 x 3 x 0.69 inches | | Manufacturer | STROTON Ltd | | Material | Cobalt , Cobalt Steel, High Speed Steel (HSS), Stainless Steel | | Material Type | Cobalt, Cobalt Steel, High Speed Steel (HSS), Stainless Steel | | Minimum Bore Diameter | 0.06 Inches | | Model | M35-Co5-inch-S | | Number of Flutes | 2 | | Number of Pieces | 13 | | Part Number | M35-Co5-inch-S | | Point Style | point | | Set Name | STROTON | | 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 - **Brand:** STROTON - **Cutting Angle String:** 135 Degrees - **Finish Type:** Hardened - **Material:** Cobalt, Cobalt Steel, High Speed Steel (HSS), Stainless 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) ![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 2](https://m.media-amazon.com/images/I/715fKRNQWjL.jpg) ![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 3](https://m.media-amazon.com/images/I/71CT+PUii3L.jpg) ![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 4](https://m.media-amazon.com/images/I/71rPwB55ZzL.jpg) ![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 5](https://m.media-amazon.com/images/I/61GIQBqvDtL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality drill bits *by A***R on January 23, 2026* I am grateful for purchasing this product. I keep it inside of my drill bag. They work great on several surfaces. ### ⭐⭐⭐⭐⭐ Good Bits *by D***. on December 15, 2025* Good bit's,they cut well ### ⭐⭐⭐⭐ Works Great *by P***E on August 22, 2025* Excellent quality ## 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.pl/products/504339297-cobalt-drill-bit-set-1-16-1-4-inch-13pcs](https://www.desertcart.pl/products/504339297-cobalt-drill-bit-set-1-16-1-4-inch-13pcs) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-10*