Features and Benefits:Contains the following drill bit sizes: 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. 15/6 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.Cobalt Steel – extended cutting edge life & maintains cutting life after resharpening.135 degree Split Point Tip – starts on contact cuts with less forceReduced Shank above 3/8 inch – allows the use of larger drill bits in a 3/8 inch chuck