Closeout Mount, Seadog brand, new in package. Has the US standard 1"-14 threads so any antenna made for thread-on will fit. This mount is 4-way, with the lower axle fastened by a bolt and nut. The upper axle has the quick-release knob for easy dropping of the antenna to horizontal.
Requires 4, 1/4" diameter bolts or screws for installation on any boat. Not Included.