6-jaw design lathe chuck: diameter: 160 (mm) internal jaw clamping range: 3-55 (mm), external jaw clamping range: 50-145 (mm). Each jaw cannot be adjusted individually. High-quality materials-The main body of the chuck is made of high-quality cast iron. All guide rails and bearing surfaces are precision machined. Durable two sides are polished and hardened. Scope of application-The chuck is suitable for machine tools and accessories, such as ordinary lathes, economical CNC lathes, grinders, milling machines, drilling machines and machine tool accessories. Jaw material: Hardened steel. Maximum speed: 2500 r/min. Lower jaw: 6 lower jaw. Clamping range A-A1: 3-55mm. Interference range B-B1: 50-160mm. Clamping range C-C1: 55-145mm. 1X Self-centering chuck body. 1X Security Chuck Key.