High quality material The speed drill chuck is made of high quality plastic and chrome vanadium steel, offering high hardness and durability. It is strong, wear resistant, not easy to break, resistant to rust, and designed for a long service life. Easy to install This keyless chuck converter allows easy conversion of an electric screwdriver into a drill or grinder. It enables quick locking and unlocking of the drill bit without the need for a key. Simply insert the chuck into the hammer drill. Compact and portable design helps improve work efficiency. Secure locking performance The jaw features special processing for good abrasion resistance. The chuck includes built-in anti-thrust bearings that convert applied torque into strong grip force, helping prevent loosening under heavy vibration. Multifunctional drill chuck Includes 1 drill chuck and 1 air pack adapter. The keyless design allows for easy operation and quick clamping of drill bits. Saves time and enhances safety when securing round and hex shank drills. Versatile applications Available in multiple sizes, suitable for use with hammer drills, impact drills, power drills, gear chucks, and most cordless drills and screwdrivers. Ideal for drilling, clamping, and routine tasks in applications such as maintenance, auto repair, garage, warehouse, office, and home use. Quick-change SDS shank design Designed for electric hammers, constructed with all-metal components for enhanced durability. Features a locking function and strong clamping force to effectively prevent drill bits from loosening. Secure tightening of the rotation adapter helps avoid issues from hammer action and high vibration. Keyless chuck operation Finger-tightening allows quick更换 of drill and screwdriver bits. Comfortable jacket surface provides a strong grip and improves handling, increasing output torque. Unique thrust bearing design Efficiently converts handle torque into enhanced grip strength for improved performance. Specifications: Material: Chrome Vanadium Steel Hole Diameter: 12mm Clamping Range: 2-13mm Mounting Thread: 1/2-20UNF Application: Suitable for hammer drills with 1050W power or above Package included: 1 x Drill Chuck 1 x SDS Adapter