High quality materialThe speed drill chuck is made of high quality plastic and chrome vanadium steel, high hardness, durable in use, strong, wear resistant, not easy to rust and with long service life. Easy to InstallThis keyless chuck converter can easily convert an electric screwdriver into a drill or grinder. Easily lock and unlock the drill, no key needed. Just 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 heavy vibration. Versatile Applications: These chucks are available in different sizes, suitable for hammer drills, hammer drills, electric drills, gear chucks, drilling, tightening, most cordless drills and screwdrivers. Can be used for routine maintenance, auto repair, garage, warehouse, office, home, etc.