The DIAMOND CATV Drop Wire Clip is used in drop installations to secure drop wire and common ground wires to either wood or masonry surfaces. Specifications · Aluminum thickness is .025" · Hole diameter is .209" · Fastening is accomplished by passing a screw through the holes and securing the clip to the structural surface. · The particular grade of aluminum chosen allows for both excellent strength as well as formability around the cable. · Excellent corrosion resistance. · Made in the USA.