The Super Convi Clamp, made of lightweight cast alloy, can be securely mounted on any tube from 5 to 51mm and equipped with a saddle for mounting onto flat surfaces. The elastic P.U. pad also reduces surface damage and enhances gripping action. All metal parts are made of stainless steel to make them sturdier with anti-rust features. The die-cast aluminum of the locking knob make it very rugged. With a built-in female socket it allows the use of any attachments to hold anything from backgrounds to lighting fixtures. The spring safety locking system also offers double insurance when the screw locking action is not completely finished.