Adjustable jaw opening: The wrench features an adjustable jaw opening that provides versatile use and compatibility with a range of screw and nut sizes. Forged chrome-vanadium steel: Made from chrome-vanadium steel to ensure strength, durability, and long lasting performance. Movable head design: The wrench has a movable head that allows easy size adjustment. This design increases flexibility and comfort in various applications. Multiple specifications: Available in sizes 17.8 cm, 20.3 cm, 30.5 cm, and 38.1 cm. The wrench offers a range of options to meet your specific needs. Choose the size that best fits your requirements. Use scenarios: - Bike maintenance and repair: Tighten or loosen bolts on bicycles, including components such as derailleurs, brakes, and cranksets. - Furniture assembly and home projects: Adapt to different bolt sizes during flat-pack furniture assembly or general household maintenance. - Automotive and machinery tasks: Efficiently handle fasteners in engine bays or on equipment that require different sized wrenches.