The Keyless Chuck is compatible with Bosch impact drills. 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. Keyless chuck chrome-plated • Up to 13-mm Diameters • Keyless Chuck is a Bosch System Chuck with a capacity from 1.5- to 13-mm diameters • Clamps drills using minimal effort and does not require a key • Compatible with Bosch impact drills Specifications: Chuck capacity mm: 1.5–13.0 Mount range: 1/2 – 20