Metal Clamps are produced specifically for all kinds of flexible air duct connectors. They consist of stainless steel strips and locking clips. The steel bands are 9 mm wide and 0.6 mm thick from AISI 430 quality steel strip. Strip steel bands are packed 30 m long in a plastic dispenser. The locking clips provide easy and fast clamping. The screw head is specially shaped so that simple tools like a screwdriver or spanner can be used. Housings are nickel plated and screws are zinc plated. The strip steel bonding, and clip system is easily cut and installed. That makes it the fastest fixing system available. The band is cut, folded through the slot on the clamp, and takes care of the direction of the dimples on the strip that is installed around the duct.