1Made of high quality chromium vanadium steel with whole heat treatment, high hardness and long service life. 2Heavy duty in black oxide finish, it is anti-rust and wear-resistant. 3The ball end design allows up to a tilt entry angle to reach around obstructions, and the super long shaft of wrench is suitable for those hard to reach bolt heads. 4Including the most common hex wrench sizes to remove and install most socket cap screws found in cars, furniture and equipment. 5This wrench set is ideal for garage workshop, toolbox, metal workers, mechanics and more.