These router bits feature a two-flute design for a very fine finish. The two flutes balance the cutting bit, which reduces any vibration that would degrade the finish. They make two cuts per revolution which produces a smooth surface, but must be at a slightly reduced feed rate. This range of bits from Amana are manufactured in their AMAX Extended Life carbide, which offers a number of benefits: Increased life by 200% even when working with abrasive materials Superior geometric design Improved resistance to wear Super clean cuts These bits are excellent for cutting the following materials: Wood MDF Plywood Suitable for use with CNC routers, router tables and handheld routers.-bg