This is by far the most protection from a skid plate set I have seen yet for the wolverine. I am not a fan of the direction they mounted the bolts on the foot-well protection, a few of them have a half inch or more of threads point at the tire lol. But that is an easy fix during installation. The one and only negative I see here is that it may decrease the clearance for large tires in the front. Not by much, but still less than stock. Over all, it looks like a very well laid out and engineered design, unlike some other manufacturers out there. The 4mm thickness is about equivalent to 5/32" so that is on par with others...though I personally would want to see at least 3/16" used, but then that would drive cost up more.