Single flute O-flute straight bits are engineered for cutting plastics on CNC machines where heat management is the primary concern. The large, open O-shaped flute geometry maximizes chip clearance and prevents the recutting of chips that causes heat buildup and melting in acrylic, polycarbonate, PVC, and similar materials. The straight cutting geometry produces flat-bottomed cuts with clean side walls, making these bits a reliable choice for through-cuts, dadoes, and pocket routing in plastic sheet goods.