LIZARD GO Bar Clamps - 4Pack,Horizontal Roll Cage Clamp 0.75 inch,0.875 inch,1.0 inch,Roll Bar Clamp for Bar Diameter 3/4" to 1.0" Mounting Bracket (0.75~1.0" Clamps)

These are just meant for mounting my big 10 inch round lights on my truck. Well made good job guys.

I tried another product that Amazon seems to push more than this brand, and that one was a full 1/8" smaller than specs, preventing it from fitting at all. The Lizard Go clamps are on-spec, fit perfectly and are well-made. They come with multiple sizes of rubber spacers that can be mixed and matched to provide the best fit for a particular bar. Once properly installe, they won't budge, even under significant pressure. I'm using these to attach equipment to a grab bars - definitely not the intended use and probably not covered by the manufacturer's liability - but they are safe and secure. As others have noted, the metal is a soft aluminum and the screw treads are easily stripped if one relies on the screws to bring the halves together. That's just the nature of aluminum and it's true of even a top-of-the-line laptop Apple laptop case. The proper way to apply these is to clamp the two halves together - bare hands are adequate - and to then tighten the screws to where they just meet resistance. Aluminum has the advantage of being sturdy, corrosion-resistant and much lighter in weight than stainless steel, which is perfect for the intended application.

A little more expensive than the other ones is seen but these are pretty heavy duty. Used to build a mount for my gun case on side x side

installed yesterday. multiple fits, quality materials.

These are good quality two piece clamps, with plastic and rubber inserts for different size round bars. Stainless steel hex head fasteners. Good quality for the price!