Shakespeare 4186 Nylon Ratchet Mount

Style 4186
Ratchet mount
Four-way ratchet design with handle, for deck or side mounting. Not for use with antennas longer than 8ft in self-supporting mode, as this nullifies all warranties.
Bolt holes: 5/16in dia., 3in x 1«in on center
Standard 1in-14 thread.(male)
Nylon