Crawler Conceptz Rockers for a Jeep TJ are rugged and made with high strength 3/16" plate steel. The TJ Rockers are designed and manufactured to fit the lines of your Jeep's rocker panels, forming a perfect fit. The Crawler Conceptz TJ Rockers are CNC laser cut from 3/16-inch steel construction with sturdy internal gussets and precision brake-formed for a perfect fit. Crawler Conceptz uses 5/16 bolts, larger than our competitors, to minimize those annoying spinning nutserts that can bring installation to a grinding halt.. The TJ Rocker Armor are designed for maximum clearance at both ends to clear those rock-swallowing tires.