Vinyl dipped galvanized steel tubing clamps often called "P" clamps, are a galvanized steel clamp that is coated in vinyl. The double clamp's function is to allow two separate hoses to be run through the same clamp. The galvanizing protects against corrosion and the vinyl coating protects the clamp from harming soft surfaces. They are used for running cable, wire loom, tubing and hose and much more. They are fastened with a single screw.