The O Slim 1.5 Clamp from American DJ is designed to fit in-between the "V" shaped truss braces where larger size clamps will not fit. It can also be used like a traditional O-Clamp to hang smaller fixtures under 28 lb (13 kg). The O Slim 1.5 Clamp wraps around the entire 1.5" or 2" truss pipe to avoid scuffing, scratching, and denting of the truss.