Used for steel rivets, no rust, . Reduce slippage and injuries. Adjust the connecting rod for firmly fixing in the footwear. Use with various sports shoes, hiking shoes, mountain boots, etc. It is used for the horizontal frontier of ice clim, ski mountaineering and glacier hiking. Material: Manganese Steel Suitable for foot length: 22.5cm-30cm Weight: 1.2 grams packing list: 1 *pair of crampons 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.