Introducing the Solid Carbide Router Bit by POWERTEC. This router bit possesses a slow, spiral down cut designed to produce sharp cutting edges and smooth finishes. It's intended for high RPM and produces much smoother cuts than standard straight router bits. This bit is made out of solid carbide, material well known for it's prolonged working life due to their hardness factor. These bits are best utilized with hard plastics, wood composites, natural woods and solid surfaces. in addition, the down-cut spiral design leaves a smooth surface when trimming the edge. for many professionals, down cut spirals offer the optimal stability for the thin workpiece. Spiral Cutting Edges: The slow spiral cutting edges remove the material with less effort and leave smooth finishes. Specification Direction: Down-cut Shank: 1/4 in. Cutting diameter: 1/8 in. Cutting length: 1/2 in. Overall length: 1-31/32 in. Flute: 2 Solid Carbide Made out of solid carbide, these bits are best utilized with hard plastics, wood composites, natural woods and solid surfaces.