ESI  -CH16 pro clamp features an adjustable 180-degree half conical connector for single tube trussing. The ESI  -CH16 pro clamp wtih half conical connector for single tube trussing allows you to add a single tube or create a new connection point to the angle you desire. It can be set from 0 to 180-degrees, giving you versatility and pleanty of truss clamping options. Each clamp is made of heavy-duty cast aluminum for long life, great strength, and ease of use.