Ask someone if they have a pen, and maybe they’ll lend you one. Ask someone for a ruler, and you’re bound to be disappointed. Rulers are pretty essential items of stationery, but people don’t seem to carry them around. The RULE/ONE by HMM Project combines the ruler and the pen in a package that makes them look like they’re meant for each other. The pen snaps magnetically inside the ruler, and both together still manage to attain a level of sleekness that’s worth applauding. The RULE/ONE also has extra attachments, including a capacitive stylus nib to keep up with current times! There’s absolutely no leaving home without this bad boy! Designer: HMM Project