The Porter-Cable 43721PC is a 1/2 inch Straight-Cutting Double Flute Router Bit. The router bit is designed for cutting fibrous reinforced plastics and epoxies. The double flute design of the bit provides superior balance and vibration-free cutting for a smoother finish and longer bit life. The Porter-Cable 43721PC bit is carbide-tipped for durability and long-lasting sharpness and fits all routers with 1/4 inch collets.