Manufactured from premium grade high speed steel. Killer Force Drills have a heavy duty 135 degree split point for self-centering and reducing thrust. Gold and black surface treated for use in stainless steel and other hard metal drilling. Drill set comes in a rust resistant, water and shatter proof BIT Cooler case. Set includes 29 drill bits from 1/16 to 1/2 in 1/64 increments. Buy two or more sets and the shipping is free! Sizes in the set 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" and ½”