Ratchet-Locking Thread-Mount Keyless Drill Chucks
Threaded Mount
These chucks have a ratcheting mechanism which allows for easier tightening and releasing of drill bits and other tools. They mount directly onto the threaded spindle of a hand-held power drill. All have carbide jaws, which are harder and grip tighter than steel jaws. A ball-bearing design provides increased gripping force to keep the drill bit from slipping.