1、【Premium Material】: Multifunctional universal wrench made of 40CR chrome vanadium steel, high hardness and high torque, rust, and corrosion resistance. 2、【Quenching Process】: The thickening surface quenching process, enhances the hardness and toughness of the product, to ensure sufficient torque, twisting stability, and antislip. With high abrasion resistance under specific working conditions. 3、【Finely Thrown Plating Surface】: The surface is coated with anti-rust oil, anti-penetration, and corrosion-resistant, effectively preventing the tool from rusting, and suitable for a variety of operating environments. 4、【Strong Biting Ability】: Large opening size, wear-resistant, precise biting, easy to realize the biting snap on the screwed object. Engineering mechanics principle design, plus hold tight, no slipping, long-lasting durability. 5、【Two-color Covered Rubber Handle】: PVC coated rubber handle, according to ergonomic design, comfortable to hold and energy saving, suitable for long time work, improve the user's work efficiency. 6、【Arbitrary Clamping】: Automatic fitting of a variety of common nuts and fittings, such as hexagonal nuts, tube nuts, octagonal screws, round pipes, shaped screws, and so on. 7、【Wide Applications】: Suitable for repairing tube fittings, hexagon bolts, pressure gauges, shaped bolts, round tube fittings, and so on.