Rapid yet controlled stock removal Easily smooths the hardest stock Use on Wood, Foam, Epoxy, Acrylics, Soap Stone, Silicone, Plastic, Polyurethane, Graphite and more Not for use on METAL or CERAMICS Recommended Operating Speed: 4,000 to 25,000 RPM Saburr Tooth carving sanding disc “Power Carving” rotary tools feature long-lasting, razor-sharp carbide cutting teeth arranged into a unique open pattern to resist “loading” while providing the “Power Carver” rapid stock removal and smoother Industries Ideal for use on difficult to cut materials.