U-Bolt Mounting Kit for Mast Mount Ham UHF VHF CB Cellular Trucker Antennas on Mast/Tube/Pipe/Pole for Outdoor Applications The Dual U-Bolt works with 3G 4G 5G LTE Puck Style Antennas for Gateways, Wireless Puck Antenna. [MATERIAL] The U-Bolt is made from zinc plated steel with a rust-proof coating finish. The L-type bracket is made of aluminum [Jaw blocks make it more stable] The antenna mast clamp kit uses jaw blocks with two long bolts for a more solid installation to ensure that the pole does not slip. [Sturdy and beautiful] Strong, strong and beautiful, and wear-resistant. Color: As shown Material: Metal Package Contents: 2 x U-clamp kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.