The Kupo Stage Clamp is a durable and reliable hardware made of solid steel, widely recognized as one of the industry's most popular clamps. It is specifically designed to safely rig heavy luminaries and can support a payload of up to 150kg (242.5lbs). The clamp is tailored to pipe sizes ranging from dia. 38-51mm (1.5"-2.0") and features an incorporated junior receiver (28mm) with a secure safety lock system.