CNC Router Bit Collections are made by Amana Tool, the leading manufacturers of cutting tools. Use Amana Tool 3-Pc 3D CNC Signmaking, Lettering & Engraving SC 1/4 Router Bit Set for the most demanding signmaking lettering and engraving tasks. It is designed 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, Foam, Laminate, MDF/HDF, Melamine, Plywood, PVC Plastic, Sign Board, Softwood/Hardwood, Veneered Plywood, Xanita Board. Set #AMS-186 Includes the Following Tools: 45780, 45901, 45981.