All soapstone refills are #1 Select Natural Grade Soapstone. 1/4" Round. 5" Length. Mark white clear and removable markings. The soapstone holder can prevent soapstone breakage and tighten the stone in place, allowing easy adjustment for more precise marking to yield more accurate welding. The soapstone holder kit include:2pcs round soapstone holder with refill and 12 round soapstone refills. Soapstone holders are made of aluminum by high-quality CNC process, and comfortable to hold, rustproof, wear resistance, the thread texture is clear, easy to fasten. This soapstone pencil kit is perfect for marking steel, iron, and aluminum. Widely used in welding, metal Fabrication and construction., Manufacturer: Akfldms