It is a Carbide Bit/ V-shape Engraving Bits/Milling Cutters/Carbide Tool/Drill Bits. Product Type: Flat bottom engraving bits. Shape: V-shape. Material: solid carbide with titanium coating. Application: It is designed mainly for the engraving and marking of ABS, Acrylic, Wood Plank, PVC and Double Color Plate etc.