Key Type Drill Chuck, Type: Plain Bearing, Capacity: 1/16 to 1/2 inch, Mount: 1/2-20, Key No.: K2. The one piece gear ring and sleeve elimintes the possibility of tooth breakage. The jaws, gear ring and body are all totally hardened to avoid wear and lengthen the life of the drill chuck.
*Photos are for general reference of product. The photos are not specific to each size