Chassis mounted unit construction assures easy installation and maintenance Tapered push rail and angled covers Steel endcaps and covers Available as Fire Exit Hardware (12-) For Doors: 1-3/4" (44mm) thick standard. 4-1/2" (114mm) minimum stile width required for single or double door applications using standard 649 strike Outside Trim: 28 series lever and rose trims, GTB Pulls and plates, OB knob and trims and Thumb Piece trims Mounting: Furnished standard with wood and machine screws Cover: steel Chassis: Nonferrous alloy Rail Assembly: Roll formed steel End Cap: Steel Hand: Non-handed Latchbolt: Stainless steel 3/4" (19mm) throw Strike: 649 packed standard UL Fire Rated Finish: EN Sprayed Aluminum Enamel (BHMA 689)