3-claw design-easily fix 13mm round drill . Keyless design-tool-free attachment allows you to lock and release quickly and easily. Quick-change universal connector-when used with any hex impact driver, it can easily snap into an electric screwdriver. The perfect drill bit conversion tool-convert an electric screwdriver into a drill bit or a grinder in a few seconds. specification Name: Hand- chuck set colour: black Material: iron + plastic size: 6x0.95cm Package Contents: 1 x drill chuck 1 x hex post Only 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 thing. The measurement allowed error is +/- 1-3cm.