Material: chrome-vanadium. & nbsp; sizes: 1 1 / 4-3 " (32-76mm) Adjustable wrench head, high torque, durable. Used on lever bolts, screws, nuts and more. Note: When choosing the wrench, measure the outside diameter of the round nut. Then you can choose a larger wrench to easily bend the nut. Size: Square Head, 1 1/4 " -3 " (32-76mm) Square head: 1 1/4 " -3 " Suitable for round nut outer diameter 32-76mm