Figure-eight safety catch

Figure-Eight Safety Catch: A type of safety catch in which a figure eight or hourglass-shaped hinged wire snaps over a pin. Photo and additional information.

figure-eight safety catch
A figure-eight safety catch is a hinged wire in the shape of a figure eight that uses tension to secure itself onto a short bar on a clasp.
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See also: Channel, Oval, Clip, Epoxy, Engraved