Grivel crampons. Made of aluminum, they are very light and can be attached to both mountaineering boots and ski boots. They are easy to adjust in size and easy to put on and take off, making them very good crampons. I bought them for about 28,000 yen. I am selling them because I don't use them much anymore. I have used them about 5 or 6 times. ■Specs■ ◇Number of points: 12 ◇Weight: 556g / 278g per foot (1/2 pair) ◇Material: Aluminum alloy, reinforced plastic ◇Size: One size (EUR35-46) Thank you. #crampons #Grivel #wintermountainclimbing #mountaineering #montbell #backcountryskiing