The MXTA23 Roll Bar/ Mirror Mounting bracket makes antenna installation easy. This heavy duty mount is designed to clamp on any roll bar, cargo rack, tractor mirror or semi mirror, providing for a sturdy location for your upgraded MicroMobile antenna. This mount accepts bars up to 2" in diameter, comes complete with mounting harware, and accepts 3/4 inch NMO connectors. (NMO Connector Not Included)