The BackRack antenna mount bracket with safety rack louvered insert ships with a 3.5-inch square base pre-drilled with a 7/8-inch hole for two-way communications antennas. It bolts to existing holes in the upright and positions the antenna atop the post, usable on either side. The bracket is powder coated for durability and designed to manage wiring through the mount plate, backed by a limited lifetime warranty.
BackRack Antenna Bracket 3.50in Square with 7/8in Hole Safety Rack Louvered Insert