These are handmade and tig welded and made to bolt directly to the side trays on the SCX10-2 chassis. No mods necessary for these! Made of 1/4″ 6061 Aluminum. Fits great and looks a lot cleaner. We also make these with a rock light option. Direct fit wit some minor trimming of side plate to fit rock slider with light. Made to use the Maddog rc 1″ led lightbar (part # MDRCO2OU) and can be purchased through them or their distributors.