Round Steel Tube Files. Tungsten carbide abrasive grit, use to shape arches and curves with precision.  No need to glue sandpaper to dowels anymore!  These tools are perfect for fillets, and all concave curves.  Use to shape or enlarge holes or arches etc.

R203C may also be used in a pillar drill as drum sander!

Perma-Grit® Tools will cut:-  All Woods, Glass Fiber, Carbon Fiber, Kevlar, Plexiglas, Lexan, Perspex, Acrylics, Plastics, Polystyrene, Brass, Copper, Aluminum, Ceramics, Stone, Horn, Antler etc.