[Easy to Install] Mount 2 antenna mast poles at a 90°(cross or T shape) firmly, V jaw blocks and U-shape bolts would prevent it slip down.
Slinkdsco Double Antenna Mast Clamp Heavy V-Jaw Bracket U Bolts Pipe Mounting Hardware for TV, CB, Ham, WiFi, Helium Miner, Lora Antennas, Parasols, Flags and Fishing Rods (2 Sets)
MOOKEERF Double Antenna Mast Clamp - 5 PCS Antenna Pole Mount Bracket V Jaw Block with U Bolts,Heavy Duty Mast to Mast Mount Bracket Kit for Outside Home Antenna
Channel Master Attic TV Antenna Mount – Sturdy Steel Bracket & Mast/Pole for Secure TV Antenna & Mast Installation, Durable Weather-Resistant Design, Includes 18" Galvanized Mast with 1.25" Diameter
U-Bolts V-Bolt 4 Pack 1.75 x M8 for up to 1.5" aerial or antenna mast
EZ 43-A 3 Way Antenna Masts Guy Wire Clamp, Antenna Mast Mount for Erecting 0.8" to 1.8" Antenna Masts
Jrifedptry Double Antenna Mast Clamp V-Jaw Bracket U Bolts Pipe Mounting Hardware for WiFi & TV Antenna
