Troika Construction Multi-function Pen TROIKA construction Up to the 4th photo, the images are cited from the official product website. *The ink has run out, so please prepare a replacement. This is the multi-function ballpoint pen "Construction" from the German design stationery manufacturer "Troika." In addition to a black ink ballpoint pen, it has the following functions and can be used in various situations such as design/drafting, and architecture. ・Scale ・Tire depth gauge ・Spirit level ・Stylus ・Screwdriver Item...Ruler/Drafting Supplies Type...Multi-function pen Ink...Gel ink Ink...Oil-based Features...Single color Body material...Metal