Welding screens. I use them to control the sparks from grinding and cut off wheels. Keeps the metal in a small area for clean up. Worth every penny.
I also have people stop by to chat. Had a neighbor walk in while I was welding one day. He did not know that you do not look at the welding process. So now they surround me while welding. Also work as wind blocks when welding outside. I have to sand bag them to keep them from blowing over.
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