Industrial Quality Signmaking, Lettering, V Groove Miter Fold are made by Amana Tool, the leading manufacturers of high-quality wood-cutting tools. Amana Tool RC-1148 Insert V-Groove 60 Deg x 59/64 CH x 1/4 Inch SHK CNC Router Bit has innovative CNC tool design with a high grade solid carbide insert knife which allows you to get two uses out of each insert. Once insert knife show signs of wear you can rotate the insert for a brand new cutting edge. The secure locking screw system ensures maximum safety and maintains cutting accuracy. CNC router requires quality hold downs to ensure the least possibility of material shifting during operation. Excellent for: Aluminum, Brass, Bronze, Copper, Gold, Silver & Carbon Fiber (Engraving Only), Acrylic, Foam, High-Density Polyethylene (HDPE), King ColorCore The Multi-Color Engravable Polymer Sheet, Laminate, Melamine, MDF/HDF, Plastic, Sign Board, Solid Surface, Veneered Plywood, Wood, Xanita Board, 20lbs High Density Urethane. SPECIFICATIONS: (D) Diameter: 1-1/16; (a) Angle: 60; (B) Cutting Height: 59/64; (d) Shank: 1/4; a1: 30; B1: 1-1/16; Cutting Edges: 1; Max RPM: 24,000; L1: 1-1/8; # of knives: 1.