Notched housing for chalkline alignment. Overspray protection. Full wrap-around plaster frame. Housing adjusts from 1/2 in. to 2-1/2 in. thick ceilings. Removable housing for field inspection of wiring. Universal J-box with snap-out sides. Grounding pigtail. Tool free integral Romex clamps. Integral T-bar mounting clamps. Span 24 in. T-bar spacing. Lock to secure housing. Captive. 90 degree mounting for tight spaces.