3-jaw chuck-a drill chuck with a universal key 3-jaw design can firmly fix various tool holders, range 3 adapters-3 different types of adapters can easily convert your tool into a drill bit, suitable for a variety of connection needs; 1/4inch hex adapter for screwdrivers, 1/2inch square socket adapter for impact wrenches, The s adapter is used for hammer drill/electric hammer. Convenience-Compared with the keyed chuck, the keyless chuck can fix the bit without other tools, avoiding the trouble of holding and finding the key of the small chuck Durability-The chuck is a high-precision thread with a hard rust-proof plastic body and a tight taper. Jaws and springs are made of high-quality steel alloy. All extensions are treated with anti-rust surface to extend the service life. Wide compatibility-This drill chuck adapter tool kit is suitable for gyro screwdrivers, cordless screwdrivers, impact screwdrivers, impact wrenches, hammer drills and certain angle grinders of most brands on the market. specification Name: Electric drill chuck colour: black Material: plastic + iron size: 6x1.27cm Package Contents: 1 * automatic chuck 1 * electric conversion head 1 * hex post 1 * round shank post Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.