2pcs in a package - This drills nut driver bit designed to tighten or loosen wing nuts, bolts, hooks quickly and effectively when installing shutters/panels or doing other projects, and saves lots of your time and get your job done more faster.quickly to tighten simply turn the wing nut by power drill. your Impact Driver or Drill you drive just about any wing nuts bolt or head Eye hook screw up to 5x faster than you can by hand.Just pop it into a power screwdriver and get the wingnut / shutters installed without concern about spraining your thumbs by using other hardware tools, saves wears and tears on your fingers.This wing nut driver is a perfect tool that works with any power drill (1/4 inch hex shank).The total length of the tool is about 6.6cm(2.6 inch); the outer diameter of the socket is about 18mm(0.7 inch); and the slots on the drill bit tool is 6.35mm(0.25 inch) wide.must have tools for Snowstorm protection for windows doors hardware