The oval holes in the aluminum Poison Spyder Brawler Rockers add a touch of distinctive class to the rocker armor, and allow access to mounting bolts during installation. The Brawler Rockers’ two-piece design tucks up high to reduce hang-ups in nasty terrain, and ties into the body mounts for additional strength. Both steel and aluminum versions are available. For weight savings, aluminum is best. For abusive use, steel is optimal.