General description Heavy Duty Professional 1/2-20 UNF Quick Change Chuck Tool designed for efficient and quick bit changes. This tool features a heavy steel body and is constructed from carbon steel with tungsten steel claws, ensuring durability and strength. It is specifically designed for use with impact drills of 1050W power and above, providing increased clamping force with a quick-change SDS electric hammer shank. The chuck is keyless, making it suitable for cordless drills and driver drills. Technical specifications Material: Carbon steel, tungsten steel claws Shank length: 46mm Head diameter: 43mm Clamping range: 2-13mm Mounting: 1/2-20 UNF Size: 122 x 42mm Usage Quick and easy to use by hand for fast bit changes Features a locking function to tighten the rotation adapter, preventing hammer blows and strong vibrations during work Comfortable jacket surface with a strong grip, enhancing output torque Unique thrust bearing design converts torque applied to the handle into