It's called a "chuck".......the phillips bit will break that sure as hell. If you got a couple of lock-wrenches you may be able to open that up for a real bit.

Have a good one!:jointsmile:
Psycho4Bud Reviewed by Psycho4Bud on . help Alright ...well im trying to make a bong out of a Jack Daniels Bottle... and im about to drill a hole in the bottle but I cant find the tool to loosten the clamp that holds the drill bits in... the problem is there is a philips head bit in it right now... will that drill through the glass, or will it just shatter it? Rating: 5