General description AlwaysH 2-13mm Heavy Duty Professional 1/2-20 UNF Quick Change Keyless Drill Chuck Tool is designed for efficient and quick bit changes. It features a heavy steel body and is made from durable materials including carbon steel and tungsten steel claws. This tool is suitable for use with impact drills that have a power of 1050W and above, making it ideal for professional applications. Technical specifications Material: Carbon steel, tungsten steel claws Clamping range: 2-13mm Mount: 1/2-20 UNF Size: 122 x 42mm HSS Tail length: 46mm Head diameter: 43mm Compatibility and accessories Compatible with mains use, cordless drills, and drill drivers Includes 6.35mm (1/2') SDS adapter Installation Quick and easy to use by hand for fast bit changes Locking function to prevent hammering and strong vibrations during use Usage Not suitable for counter-clockwise use Increased clamping force for secure bit retention Comfortable jacket surface for a strong grip, enhancing output torque Unique thrust bearing design for greater gripping strength Other information Manual measurement may allow for 1 - 3cm error Color may vary due to lighting and display differences