About This Quality High Speed Steel M2 provides all drills power cutting, impressive performance and long tool life; It is suitable to drill in metal, wood, plastic, etc Precision fully ground edges and flutes ensure fast drilling, excellent chips moving smoothly and ultimate accuracy; 135-degree split point prevents "Walking", reduce logging, and penetrates hard material without a pilot hole Black and golden surface finish resists corrosion and lubricates the drill bits better Drill bits include: 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, 25/64, 13/32, 27/64, 7/16, 29/64, 15/32, 31/64, 1/2 inch, 1/16 (0.0625) to 1/2" (0.5) in 1/64" increments; All drill dimensional & tolerances conform to ASME/ANSI B94.11M drill standards or USCTI - United States Cutting Tool Institute (formerly MCTI) Our goal is for buyers to be completely satisfied with your transaction. If for any reason this is not the case, we would appreciate it if you would give us a chance to address your concerns by sending e-mails or call us directly Overview Material : High Speed Steel (HSS) Cutting Diameter : 0.06 Inches Finish Type : Mixed Shank Type : Straight Cutting Angle String : 135 Degrees