[Wing Nut Driver] It is equipped with 5 butterfly nut screwdriver bits of different sizes. Inner diameter of hexagon socket: 10/12/14/16/18mm. Slot cutouts are 3.5mm (0.14 inch), 4.9mm (0.19 inch), 6.0mm (0.24 inch), and 8.0mm (0.32 inch). [Robust and ] Made of high-quality -V steel, it has strong toughness, high strength, high wear resistance, long service life and anti-corrosion design. [Safe and efficient] When installing wing nuts/louvers or other projects, you just need to connect the nut driver to the electric drill, and then let the drill its work. It only takes a few seconds to complete the work faster. Save time and protect your hands from injury! [Wing nut drill bit] This wing nut driver is the perfect tool for use with any power drill (1/4 inch hex shank). It is very suitable for installing hurricane louvers or other items, quickly and effectively fastening or loosening wing nuts, bolts, C-hooks, Q-hooks, sheep eye hooks. [Widely used] It is suitable for home DIY, auto