54151-KSSX 4" Diameter Steel Stud Octagonal Box Knockouts

1 1/2" Deep, 15.0 CU. IN.

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

Support bracket for steel studs.

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

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