From Pure Jeep:
"The PUREJEEP Crawler Steering Box Skid, Part # PJ5101, for the 1997-06 Wrangler TJ and LJ Unlimited adds essential protection to your Jeep steering box allowing it to shrug off rough terrain. Made from 3/16 steel that is made from laser cut and precision formed, this unit fully encloses the steering box while maintaining maximum trail clearance. The boxed design is more rigid than a simple cover plate and looks better too. The PJ5001 is designed to work with the factory bumper as well as many aftermarket bumpers."