[WE MAKE DIFFERENT]Compare with other styles, We provide two claw hand screw nuts to easier and faster to install. [DOUBLE PIPE-MOUNTING]The antenna pipe clamp kit is great for mounting round pipe(pole) to another round pipe(pole),the diameter range of round pipe is 1 - 1.8 inch. [JAW BLOCKS MORE STABLE]Antenna mast clamp kit uses jaw blocks with U bolts(2 in distance, 5.5 in length) to give a stronger install for ensuring the pole not slip down. [WIDELY USED]This mast mounting clamp is designed to support most WiFi, PCS, Cellular, TV antennas, Ham, flag post, torches, fishing rods, patio umbrella, parasols. It allows you to vary the mounting pipe length. [MATERIAL]Heavy duty mast to mast mounting hardware is made from Zinc-Plated Steel with anti-rust coating . size:14x5.2cm Material:Metal colour:silver Package Contents: 3 Set x Double Antenna Mast Clamp V Jaw Block with U Bolts Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.