Wing Nut DriverIt is equipped with 5 butterfly nut screwdriver 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).and durableMade of -V steel, it has strong toughness, high strength, high wear resistance, long service life and anti-corrosion design. Safe and efficientWhen installing wing nuts/louvers or other projects, you just need to connect the nut driver to the electric drill, and then let the drill finish work. It only takes a few seconds to complete the work . Save time and your hands from injury Wing nut drill bitThis wing nut driver is the perfect tool compatible use with any power drill (1/4 inch hex ). It is very suitable compatible installing hurricane louvers or other items, quickly and effectively fastening or loosening wing nuts, bolts, C-hooks, Q-hooks, eye hooks. Widely usedIt is suitable DIY, auto parts, woodworking, garden, professional machine maintenance, etc. It is a good helper in your toolbox, and 5 different sizes can your different needsColour:silverMaterial:steelPackage Contents:5 x nut driverOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/ 1-3cm.