Highly versatile, the rod height can be locked into any position by a simple thumbscrew located on the outer edge of the clamp. The clamp features a sturdy handle for tightening the unit on the edge of a table top up to 1-1/2" (38mm) thick. The plated, solid steel rod is 1/2" (13mm) in diameter by 17-3/4" (450mm) long.