Milwaukee® Chuck Key is designed for 5381-20, 5378-20 1/2" hammer drill, 5378-51 13 mm hammer drill, 48-66-4040 key holder, 5380-21 1/2" hammer drills, 5378-20 electric drill and 5378-20 1/2" electric hammer drill. Chuck key is used for tightening the 1/2" capacity jaws.
Features
For use with chuck 48-66-5185 Use with key holder 48-66-4040
