Trend Professional Straight Flute Router Cutter 3/4x1/2TC - 2 Flute Tungsten Carbide Cutter 8mm diameter x 25mm cut x 1/2" shank Main areas of use: Use TCT for abrasive materials such as chipboard, MDF, plywood, hardwoods and hard plastics Key Features: Two flutes give a clean finish to cut edges All cutters above and including 9.5mm diameter, have TCT plunge centre tips Specification: D: 5/16 inch (imperial diameter) D: 8 mm (metric diameter) C: 25 mm (cut length) OL: 69 mm (overall length) Shank Diameter: 1/2" Grade: TCT (Tungsten Carbide Tipped)