society > occupation and work > equipment > building and constructing equipment > fastenings > [noun] > hook > loop of hook and eye (3)
A loop, usually of metal, through which something may be threaded or passed, typically in order to secure it.
A small loop or ring, usually of metal, through which something may be threaded or passed; = eye, n.1 13a.
The action of catching or fastening in a temporary way, as on a hook, etc.