Overall dimensions: 71x71x14 mm / 2.8x2.8 inches (L x W) Large square size: 13.5x8 mm / 0.53x0.3 inches (Od x Id) Small square size: 11.5x6 mm / 0.45x0.24 inches (Od x Id) Triangle size: 13x9.5 mm / 0.5x0.37 inches (Od x Id) Round size: 14x5 mm / 0.55x0.2 inches (Od x Id). Material: Made of zinc alloy with an electroplated finish sturdy, durable, rust-proof, and corrosion-resistant. Features: Designed with a center hole for easy carrying on a keyring the cross-shaped design includes 2 square, 1 triangular, and 1 round socket, making it suitable for various screws. Applications: Can be used to open gas boxes, meter boxes, toolboxes, cabinet doors, etc. serves as a wrench for valves and screws in electrical, water supply, gas, and elevator systems. Instructions: Use the corresponding socket to tighten or loosen screws please verify dimensions before purchasing. Weight: 0.86 lbs.