A KD or Knocked Down Hollow Metal Masonry Frame can be used for exterior or interior applications and comes in 3 pieces (strike jamb, hinge jamb and head). The KD masonry frame can be installed before or after the wall has been built. Can be used with exterior wood stud walls as well (butts existing wall).
16 Gauge Steel - Fire-Rated up to 3 Hours
Wall Anchors for Masonry and Wood Stud Walls (New & Existing)
Standard Jamb Depths: 4-3/4" to 8-3/4"