Product Description Material: High-speed steel Good metallic texture and comfortable touch. Interface: 1/2-20UNF Clamping range: 2-13mm Application: Suitable for impact drills with power of 1050W and above. Product Description Specifications: Material: High-speed steel Drill chuck outer diameter: 40mm Clamping range: 2-13mm Interface: 1/2-20UNF Tolerance: 1-3mm. Application: Suitable for impact drills with power of 1050W and above. Features: 1. Patented locking function, unique traditional locking method, with ratchet teeth on the back, locking components are installed on the rear sleeve, length locking device, more effectively prevents workpiece from falling off, allowing the chuck to support the tool more reliably. 2. Good metallic texture and comfortable touch. 3. Unique thrust torque bearing is easy to operate, thus generating greater clamping force. Package List: 1 chuck