Sign Mounting Bracket Kit to Mount One Sign – Everything you need to mount a sign to a 4" to 12" diameter pole. Works perfect on telephone poles. This kit includes all the hardware you'll need to install one sign on a larger 4 inch to 12 inch pole, great for telephone poles. These are adjustable straps that you will tighten around the pole and cutoff the excess. Check the holes on your signs, they must be at least 5/16" to use this mounting bracket, if your holes are smaller just drill them out to a minimum 5/16".