[WIDELY USED] This pole clamp is designed to hold most Wifi, PCS, Cellular, TV, CB, Ham antennas, pipes, flagpoles, torches, umbrellas, parasols, fishing rods. It allows you to vary the length of the pipe. [3 ASSEMBLY OPTIONS] The antenna pipe clamp kit is ideal for mounting a round pipe (pole) to another round pipe (pole), square railings to another square railing, or for mounting a round pipe (pole) to square railings. (Round pipe diameter range is 1-1.8 inch, square pipe diameter range is 0-1.8 inch) [Jaw Blocks Make It More Stable] The antenna mast clamp kit uses jaw blocks with two long bolts (2.2 inch apart, 5.5 inch long) for a more solid installation to ensure the pole does not slip. [MATERIAL] The heavy duty mast-to-mast hardware is made from zinc-plated steel with a rust-proof coating. [4 SMALL WRENCHES INCLUDED] We provide 4 small wrenches to make installation easier and faster for you. Color: Silver Material: Iron + White Zinc Plated Package Contents: 6 x Antenna Mast