The MFJ-342T is a 3/8"-24 threaded HF antenna pipe/mirror mount that holds MFJ's HF mobile HamTennas™ or any 3/8" style whips steady on your automobile's mirror, luggage rack or other pipe. Hard aluminum clamps can mount to a ¼" or ½" pipe. SO-239 connector w/lock washer feeds coaxial line underneath 3/8"-24 connector. Coax not included with this unit. Also see the MFJ-342S and MFJ-344 for similar mounts. Mounts horizontally or vertically.