Up/Down (Compression) Double Flute End MillEnd mill cutting bit for a CNC router. The tip of the flute is up cut and the remaining flute is down cut. This ensures a good surface finish on the top and bottom surfaces of your workpiece. Deep passes are needed to utilize the functionality of this bit. Material Solid Carbide. Number of flutes 2. Coating Nano blue coating for a longer service life. Cutting materials MDF, veneer, plywood, acrylic, PVC, wood, plastic and resin.