For Heil booms PL-2T & HB-1
The WM-1 is a unique mount for Heil boom arms on a vertical surface.
A brass insert insures a smooth perfect fit.
The brass insert accepts a 12.7mm (1/2") Stem.
The WM-1 is about 65mm (2.58") wide, 79.5mm (3.13") high and extends approx 69.85mm (2.75") from the wall.
The WM-1 affixes to the wall via three supplied screws.