Description: Double Flute Straight bit router 8mm Shaft diameter - Carbide Height Easy and simple to use Kit, suitable for all the 1 / 4 "Collet. Cut all the composition Materials, composite Wood, hardwoods and Softwoods Use hand-held or Table Mounted Milling Machines Materials: Carbide Cutter Diameter: 6/8/10/12/14/18/20mm Shank Diameter: Approx .0.31inch / 8mm Package Includes: 7Pieces Router Bits