M2 Antennas HO LOOP Mobile Masts are aluminum masts used for mobile and base mounting of HO LOOPS. They are internally threaded with the standard 3/8 in. holes tapped at 24 threads per inch (TPI), known universally as "3/8-24". They mate directly with HO LOOPS and HO LOOP Hardware.

These masts are available in specific lengths which correspond directly to the required mounting height of HO LOOPS above a metal vehicle surface, as well as the specific spacing required when stacking two HO LOOPS for increased gain.