Four-way ratchet design with handle, for side or deck mounting. Corrosion resistant injection molded nylon construction. This bracket will accept any standard antenna with 1?-14 threads. Not recommended for whips over 8? in self-supporting mode. Installs with four ?? FH fasteners (not included). Clamshell. A 4-3/4" B 2-9/16" C 3-5/8" D 1-13/16" E 2-13/16"