steel, strong and, has a long service life Just put it in an electric screwdriver and use it, can protect your hand from damage caused by using other tools, faster than hand to screw This wing nut driver is a practical tool, it can be used with most electric drill or electric screwdriver ( 1 / 4 inch shank) It is a good helper when we working This wing nut driver is designed to tighten or loosen wing, bolts, hooks quickly and effectively when installing hurricane-shutters / panels, helps you get the job faster and saves lots of your energy Positioning bit helps you fix the screw exactly in place without worrying about wobbling or misdirection Speed up the process of twisting screws so you can work more efficiently and easily, Manufacturer: NUEAYMS