Solid carbide engraving v-bit cutters for engraving and marking a wide range of materials such as steel, stainless steel, aluminum, wood, resin, plastics, acrylics and soft metals such as brass and copper. The tip size will determine the line width when it comes into contact with the material you are engraving, for example when engraving 1/8″ tall letters use a .010 or .015 tip, but for 1/4″ tall letters use a .020 or .030 tip. Solid Carbide Shank Diameter: 1/4″ (6.35mm) Tool Length: 2″ (50mm) Half Round Single End 420-HF Choose angle and tip size.