[WE MAKE DIFFERENT]Compare with other styles, We two claw hand screw nuts to make it easier and faster for you to install. [DOUBLE PIPE-MOUNTING]The antenna pipe kit is great for mounting round pipe(pole) to another round pipe(pole),the diameter range of round pipe is 1 - 1.8inch. [JAW BLOCKS MAKE IT MORE STABLE]Antenna mast kit uses jaw blocks with U bolts to give a stronger install for ensuring the pole not slip . [WIDELY USED]This mast mounting is designed to support 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 Metal with anti-rust coating finish. size:14x5.2cm Material:Metal colour:Silver Package Contents: 2 Set x Double Antenna Mast V Jaw Block with U Bolts Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.