52151-KSSX 4" Square Steel Stud Shallow J Box Knockouts

1 1/2" Deep, 21.0 CU. IN.

Wraparound bracket for 2 1/2" and 3 5/8"” steel stud.

Support bracket for steel studs.

11 x 1/2” knockouts (4 on bottom, 7 on sides).

5 x 3/4" knockouts (2 bottom, 3 on sides).