Features: _x000D_ The adapter allows this drill chuck to mount on electric hammer so as to convert electric hammer into a power drill. _x000D_ Classic keyed 3-jaw design securely holds a wide range of twist drills conveniently. _x000D_ 1.5-13mm drill chuck clamping range, 1/2-20UNF mounting threads at the back of the chuck. _x000D_ By using specialized anti-thrust bearing to convert key-applied torque into superior gripping. _x000D_ The clamping jaws are specially treated to improve wear resistance. _x000D_ All metal construction for long durability. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Material: Steel _x000D_ Clamping Range: 1.5-13mm _x000D_ Mounting thread: 1/2-20UNF _x000D_ _x000D_ Package list: _x000D_ 1 x Drill Chuck _x000D_ 1 x Key _x000D_ 1 x Square Shank Adapter