Open End clamps are of the same general construction as the preformed clamps with this exception, the double wrapping of the band around the hose or article is part of the application. Open End clamps are used when one end or both, of the article to be clamped, is not free or an obstruction prevents slipping a preformed clamp over the end. Open End clamps range in size from 13/16" ID to 37" ID.