The Marksmith Titanium bolt action pen is unique in that it holds a permanent felt-tip marker rather than a ballpoint pen. It opens and closes easily with one hand, and uses a genuine Sharpie-brand retractable fine tip marker cartridge.
Vital Carry has upgraded the classic Sharpie permanent marker by wrapping its ink cartridge in an aluminum, brass, copper, or titanium sleeve. Each one is machined from a solid bar of metal, and the Sharpie insert is replaceable. Laser engraving of up to 10 characters is available as an option.