The convi clamp is more than just an amazing clamp it's the foundation of an entire grip system. The all-metal convi clamp is made from a lightweight alloy that will support loads of up to 44lbs (20kg). It features a hexagonal receiver that accepts dozens of convi accessories from a simple stud to the versatile max arm to mount almost any light fixture camera or accessory. The receiver features a spring locking safety system to ensure that the convi accessory won't separate from the clamp if the locking screw loosens unexpectedly. The convi clamp has a jaw that will extend from 0.2"-2.0" (5-51mm) in diameter. It also features a saddle to securely mount it on flat surfaces. The double convi clamp is a pair of convi clamps joined back to back witha double hexagonal stud . You can use a couple of double convi clamps to join a whole variety of materials togethe r such as a cross bar on a pair of Kupoles. It comes in a black finish.