This set of two Goldwood Sound GTH-44 black steel speaker pole mounts are perfect for any speaker application. Each recessed pole mount has an overall shaft depth measurement of 3 3/4". the edge to edge measurement of the mounting plate is 4 5/16" with a 2 1/4" horizontal measurement from screw hole to screw hole and 3 1/4" diagonally from screw hole to screw hole. These heavy duty steel pole mounts accept a 1 3/8" speaker pole. Simply install the pole mounts to your speaker or cabinet with you own screws. These heavy duty pole mounts allows you to mount any speaker on a speaker stand.