Forget the old, time-consuming way of making a multiple-gang steel box out of several single-gang steel boxes. Arlington's GANGABLE plastic boxes save time and money - you'll save more than 1-1/2 minutes on a four-gang box alone! And they cost less than steel boxes.
Now you can build the box you need - when you need it - just by snapping the ends and center section(s) together.
The two-piece, nail-on FEN102 (shown), screw-on FES102 or FER102 for old work, make a two-gang box. But if you need a three-gang to ten-gang box, just add the number of center sections needed to create the new, larger box.