This bracket holds a radio antenna securely to a tripod leg. The heavy-duty bracket makes plumbing the antenna easy. Fits all full-size and heavy-duty tripods and uses a 1/2- inch long, 5/8" x 11 male stud to secure the antenna or extension (tripod sold separately). It can be used with the Seco 6-foot snap-lock radio antenna pole (#5139-02) or any extension with a male/female 5/8" x 11 connection.