--- product_id: 321471947 title: "13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron" brand: "hymnorq" price: "£14.61" currency: GBP in_stock: true reviews_count: 5 category: "Hymnorq" url: https://www.desertcart.co.uk/products/321471947-13-piece-cobalt-drill-bit-set-with-index-case-m35 store_origin: GB region: United Kingdom --- # Dual twist flute for efficient chip removal 135° split point for self-centering precision M35 cobalt steel, Rockwell 67 hardness 13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron **Brand:** hymnorq **Price:** £14.61 **Availability:** ✅ In Stock ## Summary > 🔧 Drill Like a Pro, Finish Like a Boss! ## Quick Answers - **What is this?** 13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron by hymnorq - **How much does it cost?** £14.61 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/321471947-13-piece-cobalt-drill-bit-set-with-index-case-m35) ## Best For - hymnorq enthusiasts ## Why This Product - Trusted hymnorq brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Every Time:** 135° split point design eliminates walking, ensuring clean, accurate holes with less effort. - • **Unmatched Durability:** Crafted from M35 cobalt steel with 5% cobalt for up to 12x longer life than standard bits. - • **Complete Metric Range:** 13-piece set from 1.5mm to 6.5mm covers all your metalworking needs in one sleek case. - • **Pro-Level Portability:** Compact indexed case keeps your bits organized and ready for any job, anywhere. - • **Smooth & Fast Drilling:** Dual twist flute optimizes chip removal, reducing heat and boosting cutting speed. ## Overview The Hymnorq 13-Piece Cobalt Drill Bit Set features premium M35 grade cobalt steel with 5% cobalt, delivering exceptional heat resistance and durability. Its 135° split point ensures self-centering precision, while the dual twist flute design enhances chip removal for faster, smoother drilling. With sizes from 1.5mm to 6.5mm neatly organized in a portable index case, this set is engineered for professionals tackling hard metals like stainless steel and cast iron. ## Description 13-Piece Cobalt Drill Bit Set with Plastic Index Case – M35 Grade Steel, Dual Twist Flute, and Precision Design Upgrade your drilling toolkit with this premium 13-piece cobalt drill bit set, designed for precision, durability, and ease of use. Each drill bit is crafted from M35 grade steel with 5% cobalt, ensuring exceptional heat resistance and long-lasting performance, even in tough materials like stainless steel, cast iron, and titanium alloys. Key Features: Comprehensive Set: Includes 13 drill bits with sizes ranging from 1.5mm to 6.5mm in precise 1mm increments, making it versatile for various applications. Durable Material: Made of high-quality M35 cobalt steel, offering superior strength and resistance to wear. Efficient Design: Features a dual twist flute for optimized chip removal and smoother drilling. Precision Tip: A 135-degree split point design ensures faster penetration and reduces walking on the surface. Straight Shank: Provides secure and accurate grip during operation. Chamfered Shank End: Ensures quick and easy bit insertion into the drill chuck. Fully Ground Finish: Delivers enhanced precision and cutting performance. Bronze Hue Coating: Adds an elegant finish while reducing friction and heat build-up. Storage and Portability: The set comes in a durable plastic index case, keeping all the bits organized and easily accessible whether at the workshop or on the go. Why Choose This Set? Designed for professionals and DIY enthusiasts alike, this drill bit set is the ideal choice for projects requiring precision and durability. Its robust design ensures you can tackle the toughest materials with ease, making it an essential addition to your toolbox. Order now and experience drilling efficiency like never before! Review: Arrived on time and got what I expected. Very happy Review: This is the best drill bit for drilling out stainless steel screw which is very hard metal. Do not buy the titanium coated for hard steel they go blunt in second. ## Features - COBALT STEEL - Manufactured from M35 cobalt steel, with molybdenum and cobalt added to creates a hardened alloy, measuring Rockwell hardness up to 67, extremely heat resistant; for much faster cutting and extra longer life span, with up to twelve times when compared with an average HSS drill bit. - NO CENTER PUNCH NEEDED - The 135° Quick-Cut points are self-centering and penetrate quickly with less pressure. Will not "walk" or "wander". Straight shank allows for firmly holding and accurate centering, fit for standard drill chucks and regular round collet chucks. Must be used and operated at proper RPMs for maximum efficiency - 13PC METRIC BITS - The set includes 13pcs of M35 cobalt steel twist drill bits: 1.5mm, 2mm, 2.5mm, 3mm, 3.2mm, 3.5mm, 4mm, 4.5mm, 4.8mm, 5mm, 5.5mm, 6mm, 6.5mm. Well organized in a plastic indexed storage case for easy transport to your worksite. - FOR METALWORKING - Particularly successful in cutting through hard metals such as stainless steel and cast iron, although they can be used for softer materials, too. Not for hardened steel / high carbon steel. Try to adjust the RPM when it fails to penetrate. - DOWNLOADABLE USER GUIDE - We've summed up some tips of drilling metals, including a RPM chart for several common metals, based on our reviews and some articles on the internet. In most cases, our customers would get a much better result with these tips. Welcome to download. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071ZRMWBN | | ASIN | B071ZRMWBN | | Brand Name | HYMNORQ | | Customer Reviews | 4.4 4.4 out of 5 stars (2,317) | | Customer reviews | 4.4 4.4 out of 5 stars (2,317) | | Cutting Angle String | 135 Degrees | | Cutting Diameter | 6.5 Millimeters | | Date First Available | 13 December 2017 | | Finish Types | Bronze | | Included Components | 13 pieces of metric cobalt drill bits | | Is Discontinued By Manufacturer | No | | Item Dimensions | 13 x 1.5 x 7 centimeters | | Item Weight | 0.1 Kilograms | | Item model number | DC023 | | Manufacturer | Hymnorq | | Manufacturer | Hymnorq | | Material Type | Cobalt Steel | | Model | DC023 | | Number of Flutes | 2 | | Point Style | Split Point | | Product Dimensions | 13 x 1.5 x 7.01 cm; 100 g | | Shank Type | Straight | | Surface Recommendation | Stainless Steel, Brass, Copper, Iron, Aluminum Alloy, Angle Steel, Cast Iron, Wood, Plastic | | Tool Flute Type | Twist Flute | | UPC | 610521863130 | | Unit Count | 1 Count | ## Product Details - **Cutting angle string:** 135 Degrees - **Cutting diameter:** 6.5 Millimeters - **Finish type:** Bronze - **Material:** Cobalt Steel - **Shank type:** Straight ## Images ![13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron - Image 1](https://m.media-amazon.com/images/I/71-BbfYbPlL.jpg) ## Questions & Answers **Q: Can these drill bits cut through hardened steel or stainless steel?** A: Yes. M35 grade steel with 5% Cobalt is specifically engineered for high-tensile metals like stainless steel, cast iron, and titanium alloys. For fully hardened steel (HRC > 50), carbide bits are recommended. **Q: Will these bits fit my standard cordless drill?** A: Yes. These feature standard round straight shanks. The largest diameter is 6.5mm, allowing them to fit securely into any standard 3/8-inch (10mm) or 1/2-inch (13mm) drill chuck. **Q: Do I need to use cutting oil or lubricant?** A: Highly recommended. While Cobalt is heat-resistant, using cutting fluid significantly reduces friction and heat buildup. This prevents the bit from annealing (softening) and greatly extends its lifespan. **Q: Do these bits require a center punch to start?** A: No. These bits feature a 135° Split Point tip. This design is self-centering and cuts immediately upon contact with the metal, preventing the bit from "walking" or skating across the surface. **Q: Are these bits just coated with Cobalt or solid?** A: They are solid M35 Cobalt steel throughout, not just coated. Unlike titanium-coated bits that lose effectiveness once sharpened, these maintain their heat resistance and performance even after resharpening. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***E on 10 January 2026* Arrived on time and got what I expected. Very happy ### ⭐⭐⭐⭐⭐ Review *by J***N on 3 January 2019* This is the best drill bit for drilling out stainless steel screw which is very hard metal. Do not buy the titanium coated for hard steel they go blunt in second. ### ⭐⭐⭐⭐⭐ Review *by J***W on 1 January 2018* At the time I purchased these, I only intended to use them for light duty (drilling into polymer). However, as fate would have it, I had to use them to drill into hardened steel, and much to my surprise, they performed admirably. It was a pleasant surprise (I was expecting "Chinese junk") and I'm very happy with this purchase; especially considering that it's a METRIC set, which is difficult to find (in the USA). I wish the set had a 1mm bit, but oh well. It's just a preference, not anything against the quality of the bits in this set. ============= Update 1/16/18 ============= My rating has changed from 5 stars down to 3. I needed to drill into metal again--actually I wasn't even drilling new holes, but just "chasing" already existing holes to expand them--and neither the 4.5mm or 4.8mm bits would do anything. They just spun around getting hot, without cutting anything. I even tried the 5mm bit, even though that was too big for my purposes, and it also did nothing but spin. Thus, I've used four of the bits (4, 4.5, 4.8, and 5mm), and only one of them did anything. The one that actually worked did its job well; the others are a HUGE disappointment. ============= Update 1/25/18 ============= Kudos to Migiwata customer service (thank you, Bella!). After hearing about my not-so-pleasant experience with these bits, they sent me a second set. Apparently their original supplier had run dry, and they had to use a second, temporary supplier while the original caught up with demand. The first set that I received was from the temporary supplier. The new set is from the original supplier, and the bits seem to be in order in this new set. So how do you tell the difference? By the case (see photos). The set with the blue dot on the case--which is a plastic retainer to keep the case closed--is from the original supplier. Now if you happen to get a set without the blue dot, don't panic. Just because I got a subpar set that slipped through the manufacturer's quality control process doesn't mean that you did, too. Try the bits out first. WORST case is that Migiwata customer service takes care of you like they did me; best case is you don't even have a problem. As for me and my review of this product, I'm a happy camper again and am bumping my rating back up to 5 stars. The bits are great (make sure to use a good cutting lubricant/coolant) and Migiwata customer service is stellar. ## Frequently Bought Together - Hymnorq 13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron - Owl Tools 4.5mm Cobalt Drill Bits - 13 Pack M35 Cobalt Drill Bits with Storage Case - Perfect for Metal, Hardened & Stainless Steel, Cast Iron - M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron --- ## 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/321471947-13-piece-cobalt-drill-bit-set-with-index-case-m35](https://www.desertcart.co.uk/products/321471947-13-piece-cobalt-drill-bit-set-with-index-case-m35) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-02*