noun
gadget
GAJ-it/ˈɡædʒɪt/
A small device designed for a particular practical task.
The folding gadget opens to reveal small pliers and a screwdriver.

Etymology
Its origin is uncertain. It was sailors’ slang for a small mechanical object or ship’s part whose name was unknown or forgotten, before broadening to a useful little device.
In context
you know... old-school kitchen gadget. The pestle and mortar, two bits of rock.