General description A keyless heavy-duty hand-tightened three-jaw chuck designed to fit drills with a 1/2" shaft. This chuck is ideal for impact drills with a power rating of up to 1,000 watts and accommodates drill bits ranging from 1.5mm to 13mm. Technical specifications Chuck type: Keyless Jaw type: Three-jaw Shaft size: 1/2" Power rating: Up to 1,000 watts Compatible drill bit sizes: 1.5mm - 13mm