amoolo 14 Cobalt Drill Bit10 Pcs M35 HSS Metal Drill Bit Set for Hard Metal Stainless Steel Cast Iron

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!