Review on 🔌 AGK320 Strong Hand Tools - Hole Plug Magnet, Hands-Free Welding with Pivoting Magnetic V-Pad Base, Spring-Loaded Arm & Heat-Dissipating Copper Pad - Length: 5.5 by Brandon Woodson

Used it to cover an incorrectly drilled hole on a project and it was great! The magnets are strong and the spring really holds the copper in place. There's a lot of copper in there to absorb the heat from the MIG without damaging it. Originally I was just going to take a brass chuck and attach a handle, but this was much easier to work with.