[WIDELY USED]This mast mounting clamp is designed to hold maximum Wifi, PCS, cellular, TV Antennas, CB, Ham, pipe, flag pole, torches, umbrella, parasols, fishing rods. It permits you to differ the mounting pipe length. [3 ASSEMBLE SETUP OPTIONS]The antenna pipe clamp kit is excellent for mounting round pipe(pole) to a different round pipe(pole), sq. railings to another square railings, or mounting around pipe(pole) to square railings.(The diameter differ of around pipes is 1 - 1.8inch, the diameter range of square pipes is 0 - 1.8inch) [JAW BLOCKS MAKE IT MORE STABLE]Antenna mast clamp equipment uses jaw blocks with two long bolts(2.2 inch in distance, 5.5 inch in length) to provide a more potent install for making certain the pole not slip down. [MATERIAL]Heavy duty mast to mast mounting hardware is made of Zine-Plated Steel with anti-rust coating finish. [TWO SMALL WRENCHES INCLUDED]We present two small wrenches to make it simpler and faster for you to install. Colour: silver Material: Iron + plated white zinc Package Contents: 3 x Antenna Mast Clamp 2 x wrench Only the above equipment content, different merchandise aren't included. Note: Light shooting and diverse reveals may cause the color of the thing in the picture slightly diverse from the real thing. The measurement allowed error is +/- 1-3cm.