Soap Stone (Boiler Makers Chalk) 144 per boxThe Soap Stone (Boiler Makers Chalk) is an essential marking tool for metalworkers, welders, and fabricators. It produces clear, heat resistant lines on metal surfaces perfect for layout, cutting, and welding preparation. Each piece marks smoothly without scratching or contaminating the workpiece, ensuring precision and visibility during fabrication. Key Features High Visibility Marking: Creates clear, bright lines visible on all metal surfaces. Heat