Review on 🔧 Copper Diameter Mandrel for USA Fittings by Derek Dolla

I used these copper rivets to join copper gutter sections on decking. I was happy to see that they used brass mandrels instead of aluminum or some other material that didn't match the rivet. They work like regular rivets and are a good choice for copper guttering or similar work. I should note that I also soldered the gutters to make them waterproof, but the rivets mechanically hold everything together. I would definitely buy them again but a box of 100 is a lifetime supply!