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 Craft of metal , stable , firm and durability 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 Light weight Size : Small size , easy to store and carry , bring you convenience Hexagonal connecting rod converters drill chucks , M14 polishing disc connecting rod power tool accessories, Manufacturer: Watreketal