8 in 1 Folding screwdriver Hex Key Folding (STANDARD) Brand style + : PH0 / PH1 / PH2 / PH3 style - : 3MM / 5MM / 6MM / 7MM 8 in 1 multiple specifications, easy to carry, compact and beautiful High quality chrome vanadium steel High hardness It is made of chrome vanadium steel. Overall heat treatment, high hardness, matte surface anti-rust treatment Ergonomic engineering design, comfortable to hold and easy to carry Brand new PP+TPR rubberized handle, comfortable grip, not easy to fatigue The handle and the knife shaft are connected by carbon steel screws, which are stronger in connection, with good wear resistance and excellent mechanical properties