Wikipedia
Earwire
An earwire is a bow of wire, looped to fasten an earring to a pierced ear. It is generally made of precious metal or hypoallergenic surgical steel. Earwires are available commercially, as jewelry findings, but some jewelers make their own. Earwires and similar forms can be made with simple wire wrap techniques Wire wrapped jewelry There are a variety of both commercial and homemade jigs to improve the uniformity and speed of creation. A simple homemade jig can be made with a block of wood and several nails, smooth metal pins or bolts.