When it comes to drafting, a pen’s not much good without a ruler, and vice versa. Rule/One puts both in your pocket thanks to a practical design that sees a ruler doubling as the pen’s cap. Its unique droplet profile means it easily slips into most soft cover books, packs, or pockets, aided by a lightweight milled aluminum build. Else, it’s got a stealthy black anodized finish, durable laser-engraved measurement markings, and three choices of tip colors – orange (shown), silver, and black.

Read more at BiteMyApple – $60