This Rolling Ruler is the Perfect Size for EDC

If you need a precise, pocket-size measuring device, the black titanium Rollbe Click is a great little tool; a rolling ruler that can measure flat & curved surfaces using both the metric & imperial systems, and it’s about the size of a coin, so small enough to clip onto your EDC keyring or ’biner. For every revolution of the measuring wheel, it automatically clicks, making it super-simple to keep track of each measurement. A funded Kickstarter.