It is a CNC Tools/Milling Bit/Carbide Tool/Spiral Bit/Milling Cutters/Drill Bit. Product Type: 4 flutes end mill. Material: solid carbide. Application: It is mainly used for the milling and cutting of Aluminum, Acrylic, Medium Density Fiberboard, Corlor Plates, Solid Wood Panels, Partical Board and PVC etc.