Ongwan 3.0-16MM 1/2-20UNF Drill Chuck Adapter Kit Key Type Drill Chuck with Hex Head Adapter Drill Chuck

By using anti-thrust bearings, the twisting force on the key is converted into superior grip.

3-16mm 1/2-20UNF: 3-16mm indicates clamping the drill between 3mm and 16mm, and 1/2-20UNF indicates a threaded hole with 1/2-20UNF at the back of the chuck.

The clamping jaws are specially treated to improve wear resistance.

The housing is electroplated for corrosion protection even in the worst environments.

High-precision threaded and tapered holes allow for secure mounting of tools.