Description: 3pcs 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 or head Eye hook screw up to 5x faster than you can by hand. Just 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). Wing Nuts Driver Set a must have tools for Snowstorm protection for windows doors hardware. Specification: Material: Steel Size Chart: Length: 6.6cm/2.60inch Outer Diameter: 1.8cm/0.71inch Inner Diameter: 1.2cm/0.47inch Package Includes: 3 Pieces Wing Nut Driver Bits(4 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!