CUSTOM 4x10 MASONRY BOX
     Knockouts on all surfaces, inclusing cover
     Accepts steel conduit and PVC flexible tubing with standard fittings
     Precisely manufactured to resist concrete intrusion
     Cover can be discarded but usable for on or two cable exits
 
UNIQUE MATING 12x12 JUNTION / PULL BOX
     Screw cover junction / pull box with patented GRADY BOX external clamp design
     One oversize clamp accepts 12 condustor/10AWG MC feeder
     Ten smaller clamps accept 14/2 to 10/3 AC, MC, MCI-A and NM
     Positive ground idea for MCI-A cables, like Southwire MC-AP
     Range of knockouts from 1/2" to 1 1/4" for installation flexibility
     Pre-cut 4x10 hole in back for wire pull through from masonry box
     Threaded holes and hardware to attach boxes together after concrete cures
     No messy, time-consuiming on-site drilling and sawing