Markal Silver-Streak and Red-Riter welders pencils make torch-resistant marks that will not burn or rub off like soapstone|Ideal for fine line marking during metal layout and fabrication, these highly visible marks illuminate when cutting or welding.|Durable marks will not scratch or abrade metal surfaces|Available in two highly visible colors: red for aluminum or other bright metals, silver for darker surfaces|Pre-sharpened pencils can be easily re-sharpened with any standard pencil sharpener