The most vulnerable areas on the body of the Jeep JL are the Rocker panels. Poison Spyder Rocker Knockers protect your JL rocker panel while enabling you to slide over rocks and obstacles. Rocker Knockers enhance your Jeep's trail performance while adding rugged off-road looks. The tubular rocker rail is rugged 1.75" x .120" wall DOM structural tubing. The slider rail is fabricated from CNC-bent 1.5" x .120" wall DOM tubing. The space between the slider and the main tube of the rocker knockers is filled with a 3/16" thick laser-cut steel base plate for the removable slider skid.