5 piece TCT carbide router bit set. Premium micro-grain carbide tips provide a stronger sharper cutting edge reducing wear for a longer tool life. Set includes 5/16-Inch straight, 3/8-Inch straight, 1/8-Inch corner round, 1/2-Inch dovetail and 1/2-Inch v-groove. Heat treated fully hardened bodies prevent breakage or bending under stress.