1/ Upgrade 24-tooth quick wrench to make it convenient and safe for you to use 2/S2 material bitS2 material bit bit has high hardness and long life. 3/ Mirror knurled long/short connecting rod chrome vanadium steel forging, high hardness, large torque, mirror polishing, beautiful and rust-proof. 4/ Chromium vanadium steel mirror sleeve CR-V chromium vanadium steel forging, high hardness, high torque, mirror polishing, beautiful and rust-proof. 5/ Hexagon wrench surface polishing treatment, suitable for a variety of work requirements.