I work in a shop that sells and processes a lot of stupid expensive wheels, so I'm always looking for the best protective head. I like this one because it's the same diameter so I can fit it into deep holes. However, I do wrap a few layers of electrical tap around the exposed metal. The only improvement I could think of would be to cover the entire length so the metal isn't exposed. the plastic depth gauge also fits race car cleats) and I bought a new one that I use for super trendy cleats. The