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Clamps could have been deeper...they barely reached the lip of the cap. A couple of clamps were always falling off. The cap could partially be to blame as well but if the throat was deeper they would have worked great.
I purchased a used Leer canopy for my Ranger, which came with four clamps that were a poor fit and stuck out too far from the bed rail. These clamps are perfect. They fit in close and don't stick out in the way, the clamp pad is perfectly centered on the bed rail, and they are clearly more heavy duty than the old clamps. The picture is of new and old clamps, side by side. The only cons for me is that they did not offer them in black and they did not offer them in six packs (I always use six clamps on any canopy installation). But I have no complaints against the product itself. In looking at the reviews, it appears the only people rating them low is the people who bought the wrong size clamp and found they do not fit. I don't understand why people rate a product low when they are the ones who bought the wrong size!
These are nicely machined clamps, my topper was purchased used so I have no idea what brand it is but it fits well enough to not look mismatched on my truck. I don’t detect any warpage or bending of the clamps after using them for about two months. One thing though, don’t torque the bolts down too tightly because obviously because it’s aluminum a steel bolt is always going to win. Cleaned up some burrs around the beginning threads, the bolts if you’re not careful will strip them.
These were a little pricy, but they fit our 2003 Toyota Tacoma camper shell perfectly. For years we had been using a cheap random-shape/size pack from the swap meet... they took a lot of effort to put on / take off as they didn't go underneath the bed's side quite right, and had to be angled in some cases. With these, they save a ton of time, and are the standard steel, so they should last awhile... and pay for themselves by reducing my time required. We'll definitely re-buy these in the future if the need ever arises again!