Made of heavy-duty steel and covered by rust-resistant coating, this clamp lock is quite durable, reliable and weather-resistant. Soft PVC is wrapped around the clamp which prevents scratch or damage on wheels or rims. High quality paint, absolutely durable no fade,easy to use while hard to break, you just need to do is to gently push down the key hole for lockin,and please make the top part of the key confront the corner when you unlock it. Easy to use while hard to break, you just need to do is to gently push down the key hole for locking it up, and please make the top part of the key confront the corner when you unlock it.