2-1/8in deep 4in square boxes with flat vertical brackets and (2) 1/2in, (1) 1/2in-3/4in & (4) BX side knockouts and a (1) 1/2in bottom knockout are used when 4in square boxes must be mounted directly to wood or metal studs.

Out of stock
Gtin 00655222874917
Mpn 52171-FBX
Condition new