Small lightweight profile for hanging small lighting fixtures to truss or pipes. Holds the weight of the fixture for you while you secure it. No set screw to ding truss. Fits from (1-1/4" pipe) 1.66" OD to 2" OD truss tube. The Mini-Claw is a light duty clamp, and is not designed to side arm fixtures. The Mini-Claw has a 1/2"-13 tpi by 3/4" long hex head grade 5 bolt for fastening to the fixture.