The Keyless Chuck is a Bosch System Chuck with a capacity from 1.5- to 13-mm diameters. It clamps drills using minimal effort without requiring a key. The Keyless Chuck is compatible with Bosch impact drills. The Keyless Chuck is compatible with Bosch impact drills. Features Material: Metal Product colour: Brown, Chrome Compatibility: Bosch GSB 20-2, GSB 20-2 RCE, GSB 20-2 RE, GSB 20-2 RET, GSB 21-2 RE, PSB 850, PSB 1000, PSB 1200