The belt strap allows you to use crampons with any boots or shoes. The strong steel structure has ten steel points. Equipped with a mechanism to quickly adjust the size to provide precise fit. Suitable for hiking, clim and skiing activities. Use with various sports shoes, hiking shoes, mountain boots, etc. Material: Steel + GPU-AA Size: 20.5-31cm / 8.1 * 12.2in (adjustable) Packing list: 1 *Pair of ice spikes Only the main product non-slip studs are sold, other products are not sold, and shoes are not sold. notes: 1. Due to manual measurement, different measurement methods and tools, the size may slightly deviate. 2. Due to the different shooting light, angle and display screen, the picture may not reflect the actual color of the item. Only the main product non-slip studs are sold, other products are not sold, and shoes are not sold.