Package 10pcs 7/32" , sali drill bit set has connectable accessory storage system to optimize storage space M35 cobalt high speed steel: Industry grade m35 high speed steel drill bit set, much harder than hss used in 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 Molded size:A rugged case keeps all drill bits well organized. Molded size on the case lid will help you to identify the bits you need with less effort