- Robust stainless steel construction: made from high grade 316 stainless steel with a polished surface. this marine UHF antenna mount is designed to withstand demanding sea environments and offer reliable use. - Adjustable mounting angles: two adjustable ratchets provide up to 270 degrees of upper adjustment and 180 degrees of lower adjustment to achieve the perfect angle for improved signal reception. - Wide compatibility: fits antennas with a diameter of 22–25 mm, making it a versatile addition for boats, yachts and recreational vehicles. - Easy setup: simple design enables straightforward installation on the railings of your vessel, suitable for all levels of boating. - Use scenarios: on a sailboat or motorboat to optimize VHF signaling during maneuvers; on a yacht to maintain stable and reliable antenna positioning in rough seas; on recreational vehicles with a compatible 22–25 mm antenna for portable external mounting on rail like structures.