Markal Silver Streak. Leaves a Mark Visible Thru Welding Helmets Plus A Retractable Holder.
Silver-Streak® Metal Marker - For Metal Layout and Fabrication Jobs
* Ideal for metal layout and fabrication work; marks on all types of metal surfaces.
* Marks won't rub off like soapstone and are resistant to torch flames.
* Now available in two sizes - flat and round
* Includes handy pocket clip holder