Klein Tools has designed a set of Impact Power Bits for the professional electrician. All the bits are made of high-impact rated S2 steel and color coded for easy identification. The nut drivers have strong magnets, and are also designed longer so they reach easily into junction boxes. Minimal chamfering on the nut drivers' hex pockets increases surface contact between the nut and driver for better performance. You can find these drivers along with additional size and tip bits in our Pro Impact Power Bit Set with Case (Cat. No. 32799).Warnings Do NOT use to pry or chisel Read and follow safety instructions in power tool owner's manual Always wear eye protection Features Standard 1/4-Inch hex shank Includes 3, 5/16-Inch power nut drivers Hex pockets have minimal chamfering increasing surface contact between the nut and driver Bits are color coded with the ASME standard for easy identification Impact Rated; Strong Magnet Longer pro impact power bits are designed to reach easily into boxes and panels Can be found along other sizes and tips in the Pro Impact Power Bit Set (Cat. No. 32799) S2 Impact-Rated Steel for maximum life Size: 5/16 in Shank Size: 1/4 in Material: S2 Steel Type: Impact Ready Overall Length: 2.65 in (6.7 cm) Diameter: 0.43 in (1.1 cm) Width: 0.5 in Height: 0.56 in Depth: 2.65 in Weight: 0.02 lbs Bit Type: 5/16 in Hex Nut Driver Shank Type: 1/4 in Hex Color Code: Yellow Compliance: ASME Color Coded Country of Origin: Taiwan DownloadsVideo DownloadSpec Sheet