Description: 1.Sharp cutting edge, milling, hole and plate edge, surface clean, neat, no glitches. 2.Made from carbide material, good milling properties to ensure efficient work. 3.Great replacements for your CNC or PCB machinery. With sufficient flexural strength and wear resistance. 4.Wide ranges of materials can be engraved, including: circuit boards, metal, plastics, wood, SMT, PCB, fiber glass, carbon, etc.