3 90 degree groove cutters: 6.35mm shank, cutting diameter: 6.35 mm, 9.52 mm, 12.7 mm, cutting height: 6.35mm, 9.52mm, 12.7mm. 7mm (1 2" 3 Round Nose Grooving Cutters: 6.35mm Shank, Cutting Diameter: 6.35 mm, 9.52 mm, 12.7 mm, cutting height: 12.7mm, 25/32" 2" (19 .8mm) Widely UsedV-groove and round-groove cutters are ideal for grooving in many parts in projects woodworking tool for making signs or adding decorative accents to furniture and paintings. Premium QualityMade of high quality micrograin C3 tungsten carbide with an anti-kickback design, a Increased strength and maximum strength for long life. Applicable EquipmentSpecially designed for CNC and other table-mounted automatic portable routers. Cuts all composition materials, plywood, softwood, acrylic, MDF, PVC, 3D engraving and chamfering, etc. Special feature: Industrial grade branded router bit for the job milling wood. C3 micro-grit tungsten carbide blades and solid hardened steel body with anti-kickback design. Heat resistant Teflon construction and coating with high precision, smooth cutting, impact resistance, good wear resistance. Designed for milling table or desktop woodworking engraving machine like hand milling cutter and portable CNC table , can not be used with electric drill and drill. Features: Type: round V groove. Stem Size: 6.35 mm. Blade material: C3 carbide blade. Body material: 45 carbon steel. Contents: 3 V-shaped cutters. 3 groove cutters with round edge.