For housing, grooving & mortising. Features 2mm micrograin Tungsten Carbide tips, for cutting the most abrasive materials to give extra long life. Gives a clean finish to abrasive materials such as chipboard, MDF, plywood & certain hardwoods. D 3/8 inch D 9.5 mm C 25 mm OL 66 mm Shank Diameter 1/4 inch