ZOMCHAIN Marine VHF Antenna Mounts, Ratchet Mount, 316 Stainless Steel Adjustable Base Mount for Boat (Clamp-on Antenna) Features✔ RISK-FREE purchase! If you have any issues or you think everything is not as advertised, please feel free to contact us. 24-Hour Customer Supports.✔ Exquisite design：The antenna pedestal has two adjustable ratchets. The upper ratchet has an adjustable angle of 270 degrees and the lower ratchet has an adjustable angle of 180 degrees✔ Packaging: There is a wrench. (Accessories is made of 316 stainless steel)✔ Anti-Corrosion Materials: Marine Antenna Mount made of precision cast 316 marine grade stainless steel✔ 316 Stainless steel: Marine grade 316 stainless steel, rust-proof, Excellent seawater corrosion-resistant and durable. Highly polished to a beautiful mirror-like finish✔ Size: Base measures 1" - 12 thread male, suitable for 1" rail. .