General description Keyless chuck with SDS-PLUS adapter and wrench for easy operation. Features a spindle with crown for increased flexibility during use. Technical specifications Tightening torque: 1.5 - 13 mm Internal thread: 1/2–20 UNF Material: Durable and high-quality professional tool steel Compatibility and accessories Compatible with Bosch, Makita, Hilti, Metabo, Atlas Copco drills, and all machines with SDS Plus insert.