Lightweight aluminum alloy e. The adjusting rod is connected to the front and rear parts and can be firmly fixed on the shoe. The semi-rigid e is flexible, can absorb a certain degree of vibration, and has greater strain resistance. Universal and strapping system, with maximum versatility, suitable for most boots. It is used for the horizontal frontier of ice clim, ski mountaineering and glacier hiking. Color as shown Material: Aluminum alloy (e) and TPU (binding system) Suitable shoe size: 36-45 Binding: strap type e thickness: 3 mm/1.2 inches Tooth length: 34 mm/1.3 inches Weight of crampons: 486 grams / 17.1 ounces packing list: 1 *pair of crampons 1 *Handbag Only the main product non-slip studs are sold, other products are not sold, and shoes are not sold. note: Since different computers display different colors, the colors of actual items may be slightly different from the above images. Since the size is measured manually, there will be an error of 1-3 cm, please don't mind Only the main product non-slip studs are sold, other products are not sold, and shoes are not sold.