Description: Helps keep your spokes straight and true. Light and portable. Suitable for spoke sizes 10, 11, 12, 13, 14, 15. Material: high carbon steel Outer Diameter: Approx. 4cm/ 1.57inch Inner Diameter: Approx. 16.7mm/ 0.66inch Depth: Approx. 4mm/ 0.16inch Color: Silver Package Includes: 1 Piece 8 Way Bicycle Spoke Key Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test