Zuther Wrench iD

The Wrench iD+ is a measuring tool that identifies sizes of bolt heads and nuts, displaying the exact size of wrench/socket. Wrench iD+ also identifies inside and outside diameters of piping and other related objects.

https://www.penntoolco.com/igaging-zuther-xtreme-technologies-wrench-id-with-gunpowder-gray-arms-wid-101/