Twistouts permit use of three parallel raceway runs on each side. Base has 1/2 and 1 concentric trade size KOs and a 1 13/16 (46mm) x 2 7/8 (73mm) rectangular KO to mount on a one-gang in-wall outlet box. Cover accepts devices with mounting screw centers of 2 3/4, 3 1/2, or 4 1/16 (70mm, 89mm, or 104mm), and canopy fixtures no larger than 4 5/8 (117mm) in diameter. With 5736 Blank Cover, this fitting can be used as junction box, pull box, etc. NOTE: Certified to Canadian Safety Standards for sale in Canada. When ordering these products, change the V color prefix to VC to denote the Canadian versions.