Milwaukee® Replacement Chuck Key, 1/2 in Chuck Key, 1/4 in Pilot Diameter, Product Number Compatibility: 48-66-1360, 48-66-1370, 48-66-1381, 48-66-4040

This chuck key tightens the jaws of the 1/2 in. capacity chuck 48-66-1360, 48-66-1370, and 48-66-1381. Key holder 48-66-4040 should be used to attach this chuck key to the cord set.