Electronic "Helping Hands"

“Helping Hands” is a name that is used to describe vices, clamps, clips, as well as some magnifier stands that will hold parts and boards. This is helpful when assembling a circuit.
For example, Digi-Key does have a couple options:

Magnifier, Stand 2.50" (63.50mm)

Third Hand Printed Circuit Boards

ADJUSTABLE CIRCUIT BOARD HOLDER

Vise 2.25" (57.2mm) Nylon Jaws