[thepunisher]

That is exactly why I didn't use them. The bolts are suppose to go through some existing holes. The bolts angle inward twards the tank, this causes the bolts to "hook" the frame holding it in place. I had to create a new rear crossmember for my truck so the location of the tank changed slightly. That and I didn't want to drill new holes so I decided not to use these. Somewhere on the site there are pictures of these installed.