Manufactured from chrome vanadium steel Heat treated for maximum wear High polish finish resists against rust and corrosion Longer than most standard combination wrenches to access hard to reach areas 12-point 15 degree offset box end provides added clearance KTI high polish combination wrenches are manufactured from chrome vanadium steel and heat treated for strength. All wrenches are marked with part number and size for ease of identification and come with a lifetime warranty. WARNING: Cancer and Reproductive Harm