DescriptionMade of Marine grade 316 stainless steel,the base is solid metal slab,corrosion resistant and durableDual swiveling ratchet designThe standard of thread is 1-14UNS,Fits all standard 1" marine antennasDual Axis Heavy Duty Ratchet Mount-These popular mounts are the standard for marineantennas, made all in stainless steel 316 for ocean users.Versatile dual swiveling ratchet design adapts easily to deck or side mounting on slanted or levelsurfaces, in an extra heavy-duty stainless construction with extra strength and rigidity.The quick action handle makes raising and lowering the antenna easy, and the ratchet makes iteasy to return the antenna to its correct, upright position.Its simple design makes installation simplePolished by hand to a mirror finish to assist in making a quality part. In the passivation processafter buffing, acid and rinsing remove surface contaminants from the products and producehydrous oxide film which enhances corrosion resistance. Every production shipment tested and certified