This 'O' clamp rotates 360 degrees and is used to wrap truss tubing. It is intended for use with truss mounting fixtures safely. Utilize this clamp to add security and steadiness to your performance. In order to give you the feeling of being trapped in, it tightens down firmly. When coupled with the included adaptor, this `O' Clamp. When the adaptor is taken out, it also fits everything. You won't be disappointed if you utilize this clamp with the right truss.