Material Chrome Vanadium Steel Item Package Quantity 1 Head style Open End More Wider Jaw OpeningGreater jaw capacity allows 60% wider opening than traditional wrenches, supports larger nuts, bolts, and pipes. Open 1.97 inches (50mm) for a 10-Inch wrench High-Strength MaterialsHeat-treated chrome vanadium steel, Surface black oxide polishing treatment resist corrosion for better durability. The jaws are enlarged and deepened, and the clamping is strong. Comfortable grips are designed for durability and comfort. Laser Marking With High PrecisionHigh accurate scale, allow for exact fastener fit. Mirror polish for the head of the wrench makes the surface scale clearer, convenient to work. Long and Narrow Adjustable WrenchJaw depth are 30% longer than general crescent wrenches. Longer jaws grip better, thinner jaws give greater access to tight spaces. Great for use in limited and narrow spaces to save your effort. Heavy-duty Adjustable Wrench SetThe wide open adjustable spanner with 1 size choices, is suitable for different environments. Suitable for tube/nut disassembly and assembly of various equipment, car, bicycle in the home. Ideal for plumbers, electricians, automotive, gas industries and maintainers, and any other tough jobs that require a wrench