amoolo 9/64" inch Cobalt Drill Bits(10Pcs), M35 HSS Metal Jobber Length Twist Bit Set for Hard Metal, Stainless Steel

10pcs 1/4" Cobalt Drill Bits:10pcs 1/4" Metal Drill Bits This drill bit fits most electric drills currently on the market. High-speed steel M35 Cobalt: set of industry grade M35 high-speed steel drill bits, much harder than HSS bits used in other similar drill bit sets. These drill bits contain 5% cobalt, which increases wear resistance and durability. FULLY GRINDED PROCESS & 135° Separation Point - Fully ground spiral groove design removes particles quickly, reduces friction and heat for faster and cooler drilling performance. 135° split tip with straight shank to prevent walking and make drilling accurate and faster. No center punch required. MULTIPLE USES Perfectly suitable for cutting hard metals such as stainless steel, steel, sheet metal and cast iron as well as plastic, aluminum alloy, wood and other softer metals. ✔ Pay attention to the control of speed, pressure and heat during drilling. 【90 DAY GUARANTEE】If you are not completely satisfied for any reason, please contact us for a 100% refund or replacement.