amoolo 3/16" Cobalt Drill Bit(10 Pcs), M35 HSS Metal Bit Set for Hard Metal, Stainless Steel, Cast Iron

10 x 3/16" Cobalt Drill Bits: 10 metal drill bits of 4.76 mm diameter x 58.74 mm. This drill bit fits most electric drills currently on the market and comes with a portable plastic case for easy storage and organization. High-Speed Steel M35 Cobalt: industrial grade set of M35 high-speed steel drill bits, much harder than HSS drill 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.