Universal Self-Tightening Chuck 【 Material】The quick drill chuck is made of plastic and chrome vanadium steel, high hardness, durable in use, which is strong, wear-resistant, not easy to rust and has a long service life. 【Easy to Install】This keyless chuck converter can easily convert an electric screwdriver into a drill or grinder. Easily lock and unlock the drill bit without the need for a key. Simply click the chuck into the impact drill, small and portable, improve work efficiency. 【Not Easy to Loosen】Special jaw treatment with good abrasion resistance. The keyed chuck has built-in anti-thrust bearings that convert hand-applied torque into excellent grip and prevent loosening caused by strong vibrations. 【Multifunctional Drill Chuck】1 drill chuck + 1 air batch adapter, the keyless handling of the drill chuck allows for easy operation and quick tightening of the drill. This not only saves time, but also contributes to safety when clamping round and hex shank drills in the chuck. 【Versatile Applications】These Drill chucks are available in various sizes, suitable for impact drills, hammer drills, electric drills, gear chucks, drilling, clamping, most cordless drills and screwdrivers. Can be used for routine maintenance, auto repair, garage, warehouse, office, home, etc. Quick change SDS shank designed for electric hammer, constructed with all metal for supreme durability It has a locking function, large clamping force, effectively preventing drill bits from loosening, more reliable. Only tighten the rotation adapter to avoid hammer blows and other high vibrations when the work is released. The keyless chuck's finger tightening could quickly change drill and screwdriver bits. Comfortable jacket surface, with strong grip, easy to grip, which increases the output torque. Unique thrust bearing, the torque applied to the handle is easily translated into a stronger gripping force important. Specification: Material: Chrome vanadium steel Hole diameter: 12 mm Clamping range: 2-13 mm Mounting thread: 1/2-20UNF Scope of application: Suitable for impact drills with a power of 1050 W or more. Package included: 1 x Drill chuck 1 x SDS adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.