Two 1/2 in conduit knockouts (end). Old work clips. Provided U box support eliminates the need for additional box supports to secure box in wall opening. For 3/4 in sheetrock maximum thickness. Acceptable for use in 2 hrs fire rated walls. 12.5 cu-in capacity. Measures 3 in x 2 in x 2-1/2 in. UL listed.
