Drill Chuck Key, Type L-Type, Key Size 1/2 in, Pilot Size 1/2 in, Number of Keys 1, Handle Type L, For Use With 1/2 in Capacity Drill Chucks: Mfr. No. 48-66-1360, 48-66-1370, 48-66-1381, Key Holder Mfr. No. 48-66-4040