Most multi-tools have knives, pliers and screwdrivers, but the Rule/One “multi-tool” is a multi-tool for writing and drawing that features a removable pen that can be converted into a stylus or a lanyard, and a ruler with inches on one side and metric measurements on the other side. The Rule/One has a milled aluminum body and a tear drop shape that lends itself to being a bookmark for your journal. The pen can be detached from the ruler and uses a Uni-ball Signo UMR-85 refill. You can find more info and order the Rule/One for $60 from HMM. If you want to save yourself $50 and have an actual pen shaped multi-tool, check out the Super 6 in 1 Tech Tool Pen from Amazon which is less than $10 and includes screw driver bits and a built-in level.