amoolo 1/4" Cobalt Drill Bit (10 Pcs), M35 HSS Metal Drill Bits Set for Hard Metal, Stainless Steel, Cast Iron Box of 10

【10Pcs 1/4" Cobalt Drill Bits】10Pcs - 1/4”(Dia 6.35mm) x 2-3/4”(Flute Length 69.85mm) Metal Drill Bits.This drill bit fits the majority of power drill currently on the market.

【M35 Cobalt High Speed Steel】Industry grade M35 high speed steel drill bit set, much harder than HSS used in other similar drill bits set. These drill bits contain 5% Cobalt, which increases wear-resistance and durability.

【Fully Ground Process & 135° Split Point】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 faster. No center punch is needed.

【Multiple Application】Perfectly suitable for cutting through Hard Metal such as Stainless Steel, Steel, Sheet Metal and Cast Iron as well as Plastic, Aluminum Alloy, Wood and Other Softer Metals. ✔ Pay attention to speed, pressure and heat control during drilling.

【90 Days Warranty】If you are not fully satisfied for any reason, please contact us for 100% refund or replacement.

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 good quality products at a affordable price. Amoolo is always by your side to craft your desk, living room, home even the future!