The perfect accessory for all your drilling operations Universal SDS Plus shank chuck for cordless electric screwdrivers. Can be easily and quickly converted into a drill or grinder. Threaded installation, the chuck is suitable for installation on any 1/2-20UNF threaded adapter. Screws are used to tighten the adapter and chuck. Name:Drill Chuck Set Design: Classic 3-claw design colour:Black+grey Material:metal size:3-16mm Package Contents: 1 x Drill Chuck 1 x Key 1 x SDS-Plus Shank 1 x 1/4 inch Hex Shank 1 x 1/2 inch Socket Square Female Adapter Only 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.