Good and sturdy, and they definitely latch into even the hardest of ice. I visited back home recently and happened to come during an ice storm, with several inches of thick ice present on the ground throughout my vacation. I was SO glad I thought ahead and brought my cleats along. It was my first time trying them and, by the feel of them, I could've RUN on the ice had I wanted to. Of course that meant that whenever the family needed something from the car, e.g., groceries, I was the one who was volunteered to do it because I had my cleats! Argh, irony.