Grand Slam 850 Electric VHF Antenna MountDesigned with safety and innovation in mind, boaters can adjust the position of their VHF antenna with the simple push of a button from the comfort of their helm. The GS-850 is a fully electric unit with hidden wires inside the hardtop. This mount easily installs to the surface of the hardtop and fits all top thicknesses.Features:Standard 1”-14 thread (male) shaft to accept standard VHF antennas No under-mount clearance required Machined / Anodized aluminum body with a light brushed finish Threaded shaft for consistent lift and descent Delrin bearings for smooth operation Features removable set screw for manual adjustment Kit includes drill template and installation instructions Includes 10” lead for 12-volt DC power supply for lift and descent Accepts 3A fuse in the main +12 VDC power feed (not included) Sold individually Made in the USA 1-year limited warranty