SWC 52171-OW 4Sq Cut" Old Wrk Junct

This 4 in Square 2-1/8 in Deep Cut-In Wall Box allows installers to add devices speakers strobes alarms and many other components to existing hollow walls. The 4 in Square in hole mounting provision in fits many common electrical and electronic devices and rings. 1/2 in & 3/4 in conduit knockouts on the sides and back of the box allows bi-directional conduit and cable attachment. Medium 2-1/8 in depth is great for most wall thicknesses constructed of standard framing materials.