Cutting and finishing bur utilizes hardened tool steel for fast and accurate cutting to 15,000 rpm. Bur is ideal for trimming custom trays, base plates, and tough thermoplastic sheet materials. Plastic & stone trimming burs designed for fast and smooth trimming of stone and epoxy dies, models acrylics, and resin materials. Burs constructed of carbide steel for long life. Popular taper shape with non-clogging flutes.