Usage: suitable for screwdriver handle or electric screwdriver tool (three-jaw ) to drive the sleeve. After installation, the joint can be converted into a square for head, which can be used for the installation of the sleeve. A powerful tool for conversion of Application: It can be used for installation on Tool with shapes such as pneumatic screwdrivers, electric screwdrivers, air drills, electric drills, and manual screwdrivers Lightweighted Size: small size, easy to store and carry, bring you convenience 1/4(6mm) hexagon connecting rod adapter drill chucks M14 polishing disc connecting rod power tool accessories From high strength metal , stable, firm and durability, Manufacturer: FGDTREE