I bought 4 pcs of 5' black E-track and 10 pcs of 2x4 brackets to use for building a queen bed in the back of my new Sprinter Van. I had to cut each piece with a portable bandsaw to fit them to the interior walls. I used bolts threaded into Riv-Nuts to fasten. Installation was straight forward and because of the way this product is designed it was very easy to figure out where to cut and locate the E-track. I'll also use the E-Yrack to trim my wall panels. The 2x4 brackets I'm hoping won't rattle once installed and loaded with the mattress on top. It's nice that there was forethought into even having available the end trim pieces for the E-Tack that I bought and that will finish it off nice. This whole project is the simplest, easiest, most heavy duty, and practical way by far I've found to make this bed. I've watched literally hundreds of YouTube videos for great ideas and this is in my opinion the best all around way to build a bed. The one other factor is that it's totally and easily removable if necessary in case I need to haul something...after all...I think a Sprinter Van's first purpose was as a delivery type vehicle.