It is a Carbide Router Bits/Milling Tools/End Mill/CNC Cutter/CNC Tools/CNC Router Bits. Product Type: Flat bottom engraving bits. Shape: V-shape. Degree: 90°. Material: solid carbide. Application: It is mainly used for majority of plastics, Wood, Fibre glass, Carbon, PVC, Copper, Aluminum, and Acrylic etc.