LIZARD GO Roll Bar Clamps - 4Pack,Horizontal Roll cage Clamp 2.25in 2.375in 2.5in 2.625 inch,Bumper Mount Bracket Bull Bar Clamp for LED Light Bar,Cube Lights,ATVs Whips (2.25~2.625 Clamps)

These are heavy duty clamps, worth the money

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 wont budge, even under significant pressure. Im using these to attach equipment to a grab bars - definitely not the intended use and probably not covered by the manufacturers 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. Thats just the nature of aluminum and its 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.

Used to mount light bar to top front bar on JD 790 tractor. Odd sized mount dimension. The split design of these clamps with bolts from top and bottom allowed the clamps to mount easily and without issue. I used a 1.5 shim and one of the larger shims on each clamp - worked out great as a pair of inner rubber shims of the same size was too small. Plenty of rubber spacers / shims provided. Bolts provided are just long enough for this installation, barely. I will update review after use thru the winter with the tractor attempting to rattle everything loose. Happy with purchase. Appears to be well made and well thought out. Other clamps I reviewed appeared to be hinged on one side and one bolt and this assumes uniform clamping around a tube. Much better for my app to have the two screw, non-hinged, mount.