The hard crossbar kit was designed to mount to the 2007-2018 JK 4 Door and 1997-2006 TJ Hard-top. The system includes our own specially designed mounting track system (48"L Aluminum Track) with steel backing plates. The 1 1/8" dia. Steel crossbars are 58"L and are compatiable with Yakima products. Minor drilling is required for installation. Our crossbar kit will hold up to 200 lbs.