The Telespar (square) Base Plate is made of galvanized steel and is used to mount 2” and 2.25” Telespar posts into concrete or asphalt surfaces. The mount plate features a 6” neck and is designed to support posts up to 8-feet tall. Each base plate has four mounting holes for easy installation. No surface coring required. Available in two sizes: half plates – 4” x 8” and full plates – 8” x 8”.