♥ 𝗣𝗿𝗲𝗺𝗶𝘂𝗺 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹 -Soapstone refills are made of natural white soapstone. They are uniform in texture and size. Will not contaminate welds and easy to wipe off when desired. ♥ 𝗙𝘂𝗻𝗰𝘁𝗶𝗼𝗻 -Perfect for any slate, tiles, metal, asphalt and many more surfaces,also works on chalkboard. ♥ 𝗡𝗮𝘁𝘂𝗿𝗮𝗹 -with 27 soapstone pens are excellent for your marking needs. Our soapstone will not contaminate your weld or damage metal surfaces. ♥ 𝗪𝗶𝗱𝗲𝗹𝘆 𝗨𝘀𝗲𝗱 -Make perfect markings for Welding, Metal Fabrication, Construction, and Textile. ♥ 𝗠𝗮𝗿𝗸 𝗣𝗿𝗲𝗰𝗶𝘀𝗲 -Soapstone marking pencil mark white clear and removable Markings, Best for marking welding and cutting.