Insert Bit, Application – Tools Power, Bit Style Tamper Resistant Torx(R), Fastening Tool Tip Size TR45, Shank Style Hex, Hex Shank Size 5/16 in, Single End, Fastening Tool Material S2 Steel, Overall Bit Length 1 1/4 in, SAE, Finish Unfinished, Impact Rated Not Impact Rated, For Use With Screwdriver, Standard Driver, Insert Bit