Light-deburring and -finishing brushes have a single stem and a single spiral of abrasive nylon bristles to smooth edges and surfaces of cross holes on all metals. Single-stem, single-spiral tube brushes have low bristle density, offer limited rigidity, and are suited for general-purpose cleaning and deburring. Abrasive nylon bristles are embedded with a coarse material along the entire length that continuously exposes fresh abrasive for a consistent surface finish. Nylon bristles are flexible and suited for plastic, aluminum, brass, and copper. They also offer improved safety compared to wire filament bristles, which are sharp and may fall off during operation.