Attributes . Large 40.5 cu in wiring capacity; heavy-duty flat bracket with set-back marks for 1/2" thru 1-1/4" drywall; mounts flush with wallboard eliminating the use of mudrings or extension rings; durable, UL listed bright red polyester powder finish; features RACO's patented TKO 1/2" & 3/4" eccentric knockouts . Names