Where to Buy Accurate ruler

[MULTI-FUNCTIONAL MEASURING RULER] - A ruler, a protractor, measure font size, and line weight - all in one measuring tool for designers, engineer, and architect on the go. [HOW DOES IT WORK] - Composed of 4 parts: two straight edges, one magnet, and one iron sheet, this ruler can be easily joined or separated by assembling the 4 parts. So you can draw an angle, parallel lines, or measure font size and line weight accordingly. No more tools are required! [SMALL AND PORTABLE] - Fixed by the magnet, the ruler can be folded into a half size10cm(3.94inch) for added usability and convenience. [CREATIVE GIFTS] - A unique gift for designers, engineer, architect, etc.