This Silverline 1/4" Straight Metric Cutter features a TCT cutting edge and a strong, hardened steel shank. It is single fluted for a smooth finish, making it suitable for general routing, grooving, rebating, dados, mortising, and edge trimming. It has a maximum RPM of 24,000. Silverline offers a lifetime warranty for all hand tools and a 3-year warranty for power tools, air, and petrol tools.