For Nut, Bit, Pneumatic Screwdriver, Electric Screwdriver, Pneumatic Drill, Manual Screwdriver and Screwdriver Bit Conversion With a length of 300 mm (12 inch), it provides superior access to hard-to-reach fasteners. 1/4inch hex shank (6.35mm) fits easily into drills, screwdrivers, winddrivers, etc. Expands the range of use for all types of drills and screwdrivers. color:Black+red Material:Chrome vanadium steel size:300mm Package Contents: 2 x 300mm Screwdriver Bit Holder Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.