QUALITY: Soapstone is made of nature stone and the holders are made only with quality aluminum for good durability, reliable to apply for multiple times, you can replace the refills repeatedly so long as the holders are intact. CONVENIENT AND SIMPLE TO USE: Our soapstone holder features a pen shape for easy carrying and storage, the textured tightening collar ensures a secure grip when making markings, also easy to apply even with the use of gloves. WIDE RANGE OF APPLICATIONS: Our soapstone pens can make clear markings in of welding, metal manufacturing, construction, machinery manufacturing, vehicle manufacturing, ship, steel, and many other place, and smooth to write, can be applied for a period of time. EASY TO REPLACE: The soapstone refills are easy to be put into the holders, and the tightened end collar always hold the pen refill securely and safely, you can also use pliers to tighten it. PERFECT MARKINGS: Make Perfect Markings for Welding, Metal Fabrication and Construction, Manufacturer: Akfldms