Material: carbon steel and YG8 alloy; Shape: V-groove; Rod diameter: 8mm. The V Groove Woodworking Grooving Cutter is ideal for grooving in many parts in woodworking projects. With good milling, cutting performance ensures high efficiency. Use with edge guide for chamfer and bevel edges. Very good concentricity, double edge cutting design, sharp edge, the bottom does not leave crumb residue. Used for hand router tools, table mounted and CNC machines. Suitable for materials: Acrylic, MDF, PVC, 3D engraving and chamfering, etc. Specification: Housing: Solid hardened steel. Blade: Industrial Grade Micrograin Carbide Shank Diameter: 8 mm.and nbsp; The dimensions of the 6 piece router bits are as follows:and nbsp; 8 x 22 x 60 - Cutting diameter: 22mm. Degrees : 60 8 x 22 x 90 --- Cutting diameter: 22mm. Degrees : 90 8 x 22 x 120 --- Cutting diameter: 22mm. Degrees : 120 8 x 38 x 150 --- Cutting diameter: 32mm. Degrees : 150