Jumper Cable Clamps 1 Pair, Battery Clamps Pure Copper, Battery Charger Clamps 4 Inch, Jumper Cable Ends Heavy Duty with Insulating Sheath for Under 5AWG Battery Cables 12V/24V/36V by XIOGZAXI

The clamps work great. Easy to attach to the cables.

These clamps replace the old ones that my portable battery charger came with. They were of better quality than I expected. I would definitely buy these again.

Im running between 20-30amps at 12v through these. They handle it well. I did a video on this. If you dont have them perfectly on the mount they do flex when they warm up. but will flex back to original clamping when you reclamp them. Easy setup.

some clamps are just not "grippy". they won't grab and they won't stay on a contact. not a problem with these, they are quite aggressive.

A good value, and it does the job usinga car battery for my generator.

Quality is awesomeQyalit is awesome

I have ordered twice both times ordered set of two (4 clamps) received one set (2 clamps).Would be a good product but have tried to get it resolved but no resolve.

For the price, these are an acceptable value; however, the clamps are not pure copper as implied in the product headline. They are definitely yellow and not red. Copper is red. The brass alloys of copper are not. Lacking a metallurgical analysis, I cannot say which brass alloy these clamps are; they are probably one of the tin containing alloys. This makes a difference if electrical conductivity is a concern since the conductivity of copper alloys is much less than that of pure copper. On the positive side, brass has more mechanical strength than copper. A check with a magnet indicated that the clamps are not plated steel; if they were, I would have given a 1 star review since steel is prone to corrosion.