It is a It is a CNC Tools/CNC Cutter/Milling Cutters/Engraving Bits/CNC Router Bits/Carving V-shaped Bits. Product Type: Flat bottom engraving bits. Shape: V-shape. Degree: 45 degree. Material: solid carbide. Application: It is mainly used for majority of plastics, Wood, Fibre glass, Carbon, PVC, Copper, Aluminum, and Acrylic etc.