Here are some various telephone cleats and special cleats. The small two wire cleats and hook cleats are marked with different N E T & T Co. embossings. One is marked U.S.A. which was comonly used by Western Electric Co. The one with the two round holes is actually spring loaded in the center. It is marked on one side Pat Appl'D For and on the other ASA. Don't know what it stands for and are still looking for a patent with no luck. The next two are from the previous photo to show there detail. The one with the groove in the bottom has a wing nut clamp to attatch it to conduit or a cable. The last piece is a very large G.E. Co. one wire cleat.