Review on ⚙️ JESTUOUS Carbide Burr Set - 8pcs 1/4 Inch Shank Diameter Double Cut Edge Rotary Files for Metal Grinding, Polishing, Carving - Die Grinder Kit Drill Bits by Jeff Keegan

Great parts. I had to destroy one to understand the truck with them. I got them to clean up welds on the inside corners of a project I'm working on. 1. Make sure you wear glasses AND a face mask. It doesn't grind, it cuts chips and throws them at you. 2. Do not press too hard on the item you are cutting, let the grinder speed do the work. I pushed too hard and the bit caught and cut into the side, causing a rattle and breaking my first bit. After figuring this out, my next bit took 20x longer to complete the entire project and is still sharp. I used a 22,000 rpm electric straight grinder.