Pilot point tip starts on contact for clean, accurate holes and reduces lock-up on breakthrough, no spin shank eliminates bit spinning in the chuck and tapered web to reduce breaking. Size markings are located above the shank to prevent wearing away. Includes one 1/16 in, 5/64 in, 3/32 in, 7/64 in, 1/8 in, 9/64 in, 5/32 in, 11/64 in, 3/16 in, 13/64 in, 7/32 in, 15/64 in, 1/4 in, 17/64 in, 9/32 in, 19/64 in, 5/16 in, 21/64 in, 11/32 in, 23/64 in, 3/8 in, 25/64 in, 13/32 in, 27/64 in, 7/16 in, 29/64 in, 15/32 in, 31/64 in, 1/2 in and case.