Three- chuck design: The drill chuck has a universal keyless three- design, allowing you to hold drill shanks from 1/32 inch to 1/4 inch (0.8 mm to 10 mm); it can Hold the drill bit tightly, it is not easy to loosen and , so you can use it safelyThe 1/4-inch hexagonal handle adapter is suitable for screwdrivers, the round handle adapter is suitable for impact drills, the square handle adapter is suitable for hammer drills or electric hammers, and the square socket adapter is suitable for electric wrenches.For your : 3/8-24UNF keyless drill chuck can fix the drill bit without additional tools, which is convenient ; all extensions have anti-rust effect and can you for a long timeWide range of applications: The drill chuck adapter tool kit is suitable for gyro screwdrivers, cordless screwdrivers, impact screwdrivers, impact wrenches, electric wrenches, hammer drills, electric hammers and other angle grinders; there are more functions to discoverMaterial:metalcolour:SilverPackage Contents:1 x 3/8-24UNF keyless drill chuck3 x handles1 x Sleeve square converterOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.