Review on 🔧 YUFUTOL 20pcs Solid Carbide Burr Set 0.118‘’（3mm）Shank Tungsten Carbide Rotary Files Burrs with 3mm Cutting Head Diameter for Woodworking, Engraving, Drilling, Carving - Compatible with Most Rotary Drill Die Grinders by Deep Echemendia

I wanted to review it because there weren't many reviews when I bought it. They are much nicer than I expected. I needed them quickly to get the job done and decided to buy better ones later. I've used them on brass, carbon steel, leather and various copper/silver alloys with no problem. They cut cleanly, the burrs themselves are well cut. I had no problems with chipping. I ran them at 15,000 RPM because that's the highest speed my flexshaft runs at, but I wish I had something closer to 30,000-50,000 RPM. Small burrs, especially carbide burrs, like to work really fast . If you're having problems, you're probably running them too slowly. If you want to see my work check out Kevin Klein Blades. Adds a little confirmation to the review.