The thin flat soapstone is made of #1 grade natural soapstone, to high temperatures, waterproof, not burn off during welding ,the mark white clear and is easy to remove. You receive 2pc thin flat soapstone holder with soapstone chalk, extra 20 pcs thin flat soapstone refills 1/16". Flat soapstone holders are made of aluminum by high-quality CNC process, and comfortable to hold. Push thumb slider allows for easy movementand refilling. The soapstone refills are easy to replace,and you just need to press the brass button with your thumb to adjust the length of these welding marking tools. This Soapstone Pencil Kit are excellent for your marking needs. Make perfect markings for welding, metal fabrication, construction and Textile., Weight: 0.49824471212 pounds, Manufacturer: Hipzeepo