In this video, we walk through a 3mm 10-piece double-cut carbide rotary burr set from KTS, showing how these tungsten carbide files perform in real workshop scenarios. You'll see the set unboxed, mounted on a rotary tool, and used on cast iron, steel, and other materials, with practical tips on RPM ranges, pressure control, and keeping the burr moving for a smooth finish. We also compare cutting efficiency and tool life against conventional files and small grinding wheels, and explain why the double-cut flute geometry improves control and surface quality. Ideal for B2B buyers, fabricators, and maintenance teams evaluating durable rotary tooling for deburring, porting, and mold work.