NewShark 7/64" Cobalt Drill Bits, 10 Pack of M35 HSS Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron,Cobalt Drill Bits with Storage Case

High Speed Steel: High speed steel construction provides ultimate durability, the cutting edge is hardened and honed for sharpness, chatter-free design with staggered cutting teeth ensure the precise countersinking and hole smooth clean. Twist Design: The split point tip and twist design increases cutting speed while easy self centering prevents walking. Say bye to all those chips and particles, with the twist design the drill bit can quickly clears them out, and leaves a clean, smooth hole.