A Double Swivel Coupler is a type of scaffolding component that is used to connect two pieces of scaffold tubing at a 90-degree angle. It allows for the adjustment of the angle between the two tubes, providing flexibility and versatility in the construction of scaffolding structures. The Double Swivel Coupler consists of two swivel sockets that are attached to the ends of the scaffold tubes and a locking pin that secures the two sockets together at the desired angle.