Adjustable wrench with central knob 12 in chrome. the jaw does not fall even if the wrench is opened to the maximum. scale in mm to preset and make precise measurements. a firm grip and the best reach high performance alloy steel forged in one piece chrome finish, precision hardened and anti-corrosion treated standards: iso 6787, din 3117, asme b107.8-2003 and bs 6333 - 1 blister and 2 industrial packaging