The clamp kits are used to mount existing antenna masts to roof, balcony or other building surface. The clamps are designed to support most outdoor extenders, 4G LTE/ WiFi/VHF/CB/Lora /TV antennas. Heavy duty, it provides a sturdy foundation and stability for mast. Heavy-Duty Clamps: These mast clamps are constructed from high-quality zinc-plated iron with an anti-rust coating finish, preventing corrosion in outdoor environments Versatile Application: Perfect for securely mounting an antenna on a pipe/pole or attaching one pipe to another pipe to mount an outdoor antenna, like 4G LTE/ WiFi/VHF/CB/Lora /TV antennas Strong Clamping Force: The clamp kit uses V-jam brackets with U-bolts to securely grip pipes and antennas, ensuring a stable hold even in windy conditions Dimensions: Supports pipes with diameters ranging from 0.98” to 2.1” (24mm-54mm), making them versatile for different mounting setups Package Includes: 2 sets of antenna mast clamps (6pcs jaw brackets, 2pcs U bots, 4pcs nuts, 8pcs washers)