Anyone who has worked on a car knows the 10mm socket. It fits a great many bolts under the hood and has a habit of rolling away the moment it is set down. The question gets asked in every garage on earth, so we pressed it onto a keychain. Crossed wrenches stand at the top, with Where's the in brush script beneath them and 10MM below in wide engraved capitals.

Country gray is a cool steel gray that looks right beside a toolbox. A metal die sinks the design into full-grain leather on one side of the fob, as a clean blind deboss. Each piece is made by hand after you order, and gold foil can be added at checkout.