Soapstone, primarily made up of talc, leaves a temporary white powder mark whenever rubbed onto a surface. This white mark is highly resistant to heat and will remain visible when heated- a useful property for welders, fabricators, carpenters, etc. Soapstone’s mark is also non-permanent on fabrics and can easily be brushed off when no longer needed- making it a great tool for sewing and design projects. Key Benefits: -Made of all natural soapstone for superior marking. -Marks will not contaminate welds and are easily removed. Key Applications: For temporary marking of metal surfaces. Also used for making a non-permanent mark on fabrics. Sold individually. One soapstone flat piece measures 5" long, 1/2" wide, and 3/16" thick.