It is a Tools/Carbide Tool/Engraving Bits/Milling Cutters/Drill Bit. Type: V-shape Engraving Bits. Degree: 25 Degree. Material: High Hardness Carbide. Application: Tungsten Metalworking Engraving Cutters, It Is Mainly Used For Majority Of Plastics, Wood, Fibre Glass, Carbon, PVC, Copper, Aluminum And Acrylic etc.