The Avenger C150 Swivelling \"C\" Clamp is an extremely robust Gravity Cast clamp that is designed to clamp on to truss, pipe grids or round tubes. It is rated to hold from 10-75 kg/22 lbs-165.3 lbs. (Up to 10 kg/22 lbs on the 16 mm/ 5/8 inch retractable spigot and up to 75 kg/165.3 lb on the Junior 28 mm/1 1/8 inch receiver.) The clamping range on this clamp is 28-78 mm/1.1-3.1 inches. The added swivelling feature allows for easy aiming of any light. The clamp includes a safety cable with pin for the junior pin and an additional thumb screw to securely lock the pin when needed. TÜV SÜD certified. Recommended Accessories: C155, E200, E390, 158, E390, 014-14, 014-38, D200, C888UH, C500, C150