Chrome vanadium alloy steel Dual function wide jaws can be used as an adjustable wrench or pipe Wrench. On one side, the jaw is flat for traditional usage to avoid damaging the parts. On the other side, the jaw is finely serrated for powerful tightening on tubes and other parts requiring strong grip and high torque. Super wide jaw opening, 50% wider than regular adjustable wrenches. Deep throat, 30% longer jaws than traditional adjustable wrenches. Screw pin with front side metric or SAE scale 15°, perfectly matched knurl and teeth of jaw for smooth running. TPR handle with end hole button.