Points are located every 5 inches along the rail. My original thought was to put them on top of the wheel wells, so the shorter lenth would have aided in a solid, flat mount. Going with the Tuffy box route, however, the 7 inch rails do seem kind of short. Short or not, they are a wonderful addition to the Jeep and very worth having. Because of the load-carrying ability of the rails, a properly used system can easily be used to tie down ATV's and motorcycles.
Installation is a snap and takes less than a half an hour.
Drill the holes. The longer rails have holes every ten inches apart. Place the rail on the mounting surface and push bolts through. Thread on the nuts and begin tightening the screws. Use a wrench to hold the nut tight while screwing in from the outside.