For the true hard core crawlers, these are not for the bling factor. No billet aluminum here. Just A50 Plate Steel, thats 50,000 PSI Tensile strength! All covers are at least 3/8" thick with 3/8" or 1/2" rings. They are fully welded inside and out. If you damage one of these I hope your not in your rig when it happens because it will take some serious carnage to do so. And these are backed by a lifetime no questions asked warranty. If you can break it we will give you a new one.