Pocket Portable Custom 1piece Diamond Engraving Pen Tool High quality tungsten steel material, high hardness, good toughness, and sharp long service life. Apply in ceramics, glass, shells, metal portray board, lettering, marking, etc. Has convenient pocket clip. Ceramic scribing Specialty hand tools. Knurled aluminum handle provides maximum control and comfort. Tungsten carbide tip marks hard materials including hardened steel, stainless steel, ceramics and glass. Incredibly hard & sharp tungsten carbide tip makes precise lines and characters on almost any metal Permanent magnet picks up small parts and retrieves steel chips from hard-to-reach places. Specifications: Material : Tungsten Steel YG8 Shank Diameter (mm): 8 Total Length (mm): 145 Net Weight (g): 54