The custom bracket mounts to your 3-inch square pole. You open the pole guard, slip it around the pole, lock the bottom screw into the keyhole and snap the clasp at the top. Easy-peasy. OR you use your safety pin that came with your gourd rack, and hang the EZ 3 from the pin. I prefer this method, however, if you live in a windy area, choose the bracket model. This product has been improved by the Troyers with the new "snake sniffer" holes which are placed on the top plate. The idea of these holes is that a snake climbing the pole, will stay inside the guard, reaching the top, and not being able to get thru will abandon. This pole guard has the largest diameter of all commercially made on the market today. Larger is better, as it is harder for the snake to circumvent.