CNC Router Bit Collections are made by Amana Tool, the leading manufacturers of cutting tools. Amana Tool AMS-188-K 4-Pc CNC Solid Carbide Spektra Extreme Tool Life Coated Signmaking/Engraving CNC Router Bit Pack, 1/4 Inch Shank is designed for the most demanding signmaking tasks. These router bits are excellent for creating signs and other CNC projects in a variety of materials. Each router bit is manufactured from Amana's exclusive grade carbide according to stringent quality standards. Excellent for: 20lbs High Density Urethane, Acrylic/Plastic, Composite, Composite Decking, Foam, Laminate, Melamine, MDF/HDF, Plywood, PVC Plastic, Sign Board, Solid Surface, Veneered Plywood, Wood, Xanita Board. Set #AMS-188-K Includes the Following Tools: 46202-K, 45771-K, 46294-K, 46282-K.