It uses a pen tip and an aluminum alloy shell, which is not easy to break.The pen tip has a hardness of 90-95HRA. The main body of the metal engraving pen is knurled, and the aluminum knurled handle provides maximum control and comfort, easy to grasp, reduce hand fatigue and not the hand.The carbide lettering pen has a clip that can be secured in the pocket. You receive 2 graffiti pens and 10 refills with protective caps, a steel ruler, these better suit your daily and replacement needs. The head of the stylus is designed to pick up small parts and iron filings.It can also be pasted on the toolbox for easy finding and loss. This metal marking tool is widely used and is suitable for carving, marking, and engraving on glass, leather, ceramics, metal plates, jewelry, plastics and wood, as well as painting and signatures!, Weight: 0.13558429113 pounds, Manufacturer: Prterver