Garvin Industries Multi Gang Boxes are 1-5/8" or 2-1/2" deep and are used in walls when multiple devices, switches, or receptacles are needed in one location.  These boxes are solid one piece construction and require a mating cover or device ring.  They can accommodate 2 through 9 devices in a single location and offer 1/2" & 3/4" or 3/4" & 1" concentric knockouts.