The Manfrotto C2811 Stage Clamp is a versatile mounting accessory for photography and video equipment. With its 80mm clamping capacity, it can be used to secure tubes, poles and boards up to 60mm thick. The clamp features a lever lock for quick and easy adjustment, as well as 1/4" and 3/8" female threads for maximum compatibility with tripods, heads and accessories. Its rugged aluminum construction ensures optimal strength and durability, while its compact, lightweight size makes it easy to carry and store.