--- product_id: 699384825 title: "Twist Drill Bit 1/4” 10 Pcs, M35 Cobalt Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron" brand: "amoolo" price: "$45.54" currency: USD in_stock: true reviews_count: 5 category: "Amoolo" url: https://www.desertcart.us/products/699384825-twist-drill-bit-1-4-10-pcs-m35-cobalt-drill store_origin: US region: United States of America --- # 135° Split Point - reduces heat & friction 10 Pcs Set - ready for any project, no downtime M35 Cobalt Steel - 5% cobalt for max durability Twist Drill Bit 1/4” 10 Pcs, M35 Cobalt Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron **Brand:** amoolo **Price:** $45.54 **Availability:** ✅ In Stock ## Summary > 🔩 Drill Like a Pro, Last Like a Legend ## Quick Answers - **What is this?** Twist Drill Bit 1/4” 10 Pcs, M35 Cobalt Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron by amoolo - **How much does it cost?** $45.54 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/699384825-twist-drill-bit-1-4-10-pcs-m35-cobalt-drill) ## Best For - amoolo enthusiasts ## Why This Product - Trusted amoolo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Risk-Free Upgrade:** Backed by a 90-day warranty—confidence in every cut - • **Versatile Metal Mastery:** Engineered for stainless steel, cast iron, and hard metals—plus wood and aluminum - • **Unmatched Heat Resistance:** M35 cobalt alloy boosts tool life and keeps performance cool under pressure - • **Perfect Fit for Your Drill:** Standard 1/4” shank fits most power drills for seamless integration - • **Precision Drilling Every Time:** 135° split point design prevents walking for clean, accurate holes ## Overview The amoolo Twist Drill Bit Set features 10 precision-engineered 1/4” bits made from M35 cobalt steel, delivering superior hardness (Rockwell ≥67) and heat resistance. Its fully ground spiral design and 135° split point ensure fast, accurate drilling in hard metals like stainless steel and cast iron, while fitting most power drills. Ideal for professionals demanding durability and precision, with a 90-day satisfaction guarantee. ## Description Amoolo M35 Cobalt Twist Drill Bits 1/4" 10 Pcs 【Specifications】 ● Material:High-Speed Steel M35 Cobalt (5% Cobalt) ● Size:1/4”(Dia 6.35mm) x2-3/4”(Flute Length 69.85mm) ● Split Point: 135° ● Process: Fully Ground ● Flute Type: Spiral ● Shank Type: Straight Round Shank ● Applications: Perfectly suitable for Hard Metals, such as Stainless Steel and Cast Iron 【What is M35 Cobalt?】 ● The addition of 5% cobalt increases drill bit’s heat and wear resistance, which makes it perfectly suitable for Stainless Steel and Cast Iron. M35 Cobalt steel drill bits can penetrate a 5mm-thick 304 stainless steel plate in 5 seconds. ● While the 5% cobalt makes the bits much more durable,it also makes them more brittle than ordinary HSS bits under improper usage. 【How to use this Drill Bit? Here are some warm tips】 ● Keep the bit vertical and fixation while drilling. ● To avoid drill bit break, 1/16” or smaller bits are suggested used with pin vise. ● Pay attention to the cooling of the bit, adding water or coolant when drilling can increase the life of the bit. 【Warranty: 90 Days】 No worries! Your satisfaction is our ultimate goal. If you have any questions or concerns about our products, please do not hesitate to contact our customer service team support@amoolo.com, we will respond within 12 hours. 【Why choose Amoolo?】 Amoolo - Craft the future! Amoolo is ONE STOP SHOP for ALL TOOL ACCESSORIES. We have years of OEM experience for international well-known brands. We are committed to providing the best quality products at a affordable price. Amoolo is always by your side to craft your desk, living room, home even the future! Review: good bits Review: Très bonne qualité - Très bonne mèches pour percer le stainless. Très bon prix pour la qualité. ## Features - 【M35 Cobalt Drill Bit】This drill bit contains 5% Cobalt (M35 Cobalt HSS), which increases the strength, the tool life and makes it more heat-resistant. Rockwell Hardness >= 67. - 【Fully Ground Process & 135° Split Point】No center punch is needed. Fully ground spiral groove design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. 135° split point with straight shank prevents walking and makes drilling precise and fast - 【Multiple Application】 M35 Coblat HSS is perfectly suitable for Hard Metals, such as Stainless Steel and Cast Iron. Can be used for Wood, Aluminum Alloy and Other Softer Metals. × NOT for Glass or Ceramic Materials. ×NOT for High Carbon Steel and Heat-Treated Steel. √ Pay attention to speed, pressure and heat control during drilling. - 【1/4” 10Pcs Twist Drill Bits】10Pcs - 1/4”(Dia 6.35mm) x2-3/4”(Flute Length 69.85mm) Twist Drill Bits.This drill bit fits the majority of power drill currently on the market. - 【90 Days Warrantyt】If you are not fully satisfied for any reason, please contact us for 100% refund or replacement ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07XMM4CPY | | Brand | amoolo | | Brand Name | amoolo | | Customer Reviews | 4.4 out of 5 stars 455 Reviews | | Cutting Angle String | 135 Degrees | | Cutting angle string | 135 Degrees | | Finish Types | Uncoated | | Finish type | Uncoated | | Item Weight | 45 g | | Manufacturer | amoolo | | Material | Cobalt Steel | | Material Type | Cobalt Steel | | Minimum Bore Diameter | 0.25 Inches | | Model | AT190214 | | Shank Type | Round | | Shank type | Round | | Surface Recommendation | Glass, Metal, Wood | | Tool Flute Type | Spiral | | Tool flute type | Spiral | | UPC | 778716244598 | | Unit Count | 10 Count | ## Product Details - **Material:** Cobalt Steel - **Finish type:** Uncoated - **Shank type:** Round - **Cutting angle string:** 135 Degrees - **Brand:** amoolo ## Images ![Twist Drill Bit 1/4” 10 Pcs, M35 Cobalt Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron - Image 1](https://m.media-amazon.com/images/I/8159y081MzL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ good bits *by P***E on 29 January 2026* ### ⭐⭐⭐⭐⭐ Très bonne qualité *by R***. on 14 October 2025* Très bonne mèches pour percer le stainless. Très bon prix pour la qualité. ### ⭐⭐⭐ Not heavy duty *by T***N on 1 July 2025* ## Frequently Bought Together - amoolo 1/4" Cobalt Drill Bit (10 Pcs), M35 HSS Metal Drill Bits Set for Hard Metal, Stainless Steel, Cast Iron Box of 10 - 1/4-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits for Hard Metal, Stainless Steel, Pack of 12 - RCINDUS (20PCS) 1/8" Cobalt Drill Bit, HSS M35 Metal Drill Bits for Steel, Stainless Steel, Cast Iron, Hard Plastic and Wood --- ## 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.us/products/699384825-twist-drill-bit-1-4-10-pcs-m35-cobalt-drill](https://www.desertcart.us/products/699384825-twist-drill-bit-1-4-10-pcs-m35-cobalt-drill) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-07*