CNC Router Bit Collections are made by Amana Tool, the leading manufacturers of cutting tools. Amana Tool AMS-221-K 8-Pc CNC General Purpose III Spektra Set, 1/4 Inch SHK is designed specifically for a wide variety of applications. Also perfect for signmaking. Each router bit is manufactured from Amana Tools exclusive grade carbide according to stringent quality standards. Excellent for: Carbon Fiber, Composite, Fiberglass, Fiberglass PCB Board, Graphite, MDF/HDF, Phenolic Composites, Plastic, PVC & Acrylic, Plexiglass, Sign Foam, Sign Board & HDU, Wood. Set #AMS-221-K Includes the Following Tools: 45626-K, 45624-K, 46248-K, 46202-K, 46200-K, 46282-K, 45771-K, 46294-K.