Drill Bit Set 21Pc, Cobalt Twist Drill 1/16″-3/8″, M35 High Speed Steel, 135 Degr. Item dimensions L x W x H. 5.82 x 4.13 x 1.24 inches. 5.82 x 4.13 x 1.24 inches; 1.46 Pounds. High Toughness Material: Our drill bit is made of High Speed Steel M35, a molybdenum mix containing 5% cobalt which improves its toughness and hardness, making it highly suitable for drilling stainless steel. It can also drill sheet metal, hardened metal, cast iron, plastic and wood. More Professional Performance: Its 135° split point tip and double split edge design, coupled with its straight shank design improves stability and prevents sliding while drilling. High Drilling Efficiency: Our drill bit is fully ground which ensures smooth drilling, and its double spiral groove design prevents the accumulation of wooden chips. Wide Range of Applications: It is compatible with corded and cordless drills, pneumatic drills, drilling machines, bench drills, etc. Not suitable for impact mode. Sturdy and Durable Metal Case: Our metal case is made of cold rolled steel plate. It is designed to hold one drill bit in each hole, allowing you to take and store the drill bits easily. 21-Piece Drill Bits Included: 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 11/64″, 3/16″, 13/64″, 7/32″, 15/64″, 1/4″, 17/64″, 9/32″, 19/64″, 5/16″, 21/64″, 11/32″, 23/64″, 3/8. We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. We are always working hard to ensure your package arrives as soon as possible. We do not accept P. Please provide a physical address. We try our very best to make sure every customer is completely satisfied. If there’s a problem, message us! We’re happy to help.