This steel ring clamp has a 7 inch outer diameter ring which can be rotated and locked at any angle. The inner diameter is 6.25 inches. Length is 10.75 inches; 6.5 inches from center of ring to center of bosshead. Set screw is nickel plated steel.
Ring clamps connect to a ring stand with a multitude of uses: holding a separatory funnel, beaker, or flask.