It’s not often we get excited about a ruler. In fact, we can safely say the Rule/One is the first ruler we’ve ever been excited about, and if you’re a designer, we think you’ll be excited too. That’s because the Rule/One is not just a ruler; it’s a ruler that houses a pen and doubles as a bookmark. The milled aluminum body of the ruler flows seamlessly into the milled aluminum body of the pen, which accepts any of the included interchangeable heads—ballpoint, stylus, or lanyard. And because of the slim and sloped design, the Rule/One serves as a bookmark so you can remember what you’re reading or the page in your drafting notebook you’re working on. Sleek and modern, the Rule/One looks far better on your desk than the wooden ruler you used when you were in grade school.