2-1/8in deep with 4in square boxes with wood spike vertical brackets and (9) 1/2in side knockouts and (3) 1/2in & (2) 1/2in-3/4in bottom knockouts are used when 4in square boxes must be mounted directly to wood or metal studs.

In stock
Gtin 00655222856739
Mpn 52171-WB
Condition new