Drill Chuck Key, Type L- and T-Type, Key Size 1/2 in, 1/4 in, 3/8 in, Pilot Size 5/32 in, 13/64 in, 7/32 in, 15/64 in, 1/4 in, 17/64 in, 9/32 in, 5/16 in, 3/8 in, Number of Keys 12, Handle Type L, T, For Use With 3/8 in and 1/2 in Capacity Drill Chucks