D-ring

or D ring

[ dee-ring ]

noun

1. a D -shaped, usually metal ring of various sizes, used on clothing or other articles as a closure, a means of securing straps or objects, or a decoration.

Example Sentences

A beener or D ring was attached to each trainee via a rappel seat that went around his waist and upper thighs.

From The Daily Beast

When he's in d' ring he can't be still a minute, can't let himself rest between rounds, see?

From Project Gutenberg