of Application: It can be used for installation on tool with shapes such as pneumatics screwdriver, electric screwdriver, air drills, electric drills, and manual screwdriver Light weight Size: Small size, easy to store and carry, bring you convenience Usage: suitable for screwdriver handle or electric screwdriver tool ( three-jaw chucks) 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 Hexagonal connecting rod converters drill chucks, M14 polishing disc connecting rod power tool accessories Craft of metal, stable, firm and durability, Manufacturer: YiNLuax