3-jaw chuck-a drill chuck with a universal key 3-jaw design can firmly fix various tool holders, range3 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 chuckDurability-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 on the market specificationName: Electric drill chuckcolour: blackMaterial: plastic + ironsize: 6x1 27cmPackage Contents: 1 * automatic chuck1 * electric conversion head1 * hex post1 * round shank postOnly the above package content, other products are not included Note: Light 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