The Overland rails can be purchased and easily installed on other WJ models, as shown in the above photo of a 2002 Limited. The Overland rails are functional, made of steel and weigh about 30 Lbs each. Only the adjustable end caps are plastic. The bolt holes for mounting the rails are already designed into the frame area on 2002 and later models. For 1999-2001 WJ's mounting holes must be drilled into the frame. For Laredo models, the side cladding must be removed in order to install the Overland rails. If you purchase a used set make sure the 12 J-nuts are included as well as the other parts listed in the chart below. The front brackets are built onto the rail and are not available separately. Butchen Engineering and Prince Metal Products designed and manufactured the rails for Chrysler.