These cutters are suitable for grooving rebating morticing and drilling the single flute cutters offer fast free cutting if you require a cleaner cut please use two flute cutters the depth of cut on cutters of 20mm diameter and below should be a maximum of 10mm per pass small diameters in tungsten carbide must be handled with care to avoid breakage and very shallow passes must be made use tungsten carbide tooling when working with abrasive materials such as chipboard mdf plywood and certain hard