Using these crampons is easy. First, find the right size for your mountaineering or hiking boots. You don't need any tools to adjust the size. Wrap the universal binding around your boot and secure it with the strong polyester straps. Make sure the thermoplastic heel and toe harnesses fit well. When you're walking, the flexible linking bar and pre - shaped front platform will adapt to your steps. Remember, these crampons are great for technical terrains, but always be careful on the mountains. After use, check for any damage. Clean them with water to remove dirt and snow. Store them in the included carrying case to keep them in good condition.