This, in turn, was attached to a metal ring set into the stone wall.

The strap had come free of the metal ring at one end.

Finally he bent down and pulled at a metal ring.

A metal ring showed in the wall, above the level of a man's head.

In a minute he was back, dangling a key on a heavy metal ring.

There was a metal ring on the end of the chain.

There is a huge metal ring at the top of the boulder.

A heavy metal ring was set into the floor before it.

Four metal rings were set in each corner of the stone.

At the head of each mattress was a metal ring set in the floor.