Compact Adams Rite UltraLine 7400 Series premium electric strikes feature an adjustable split-jaw design with over 2,400 lbs. of holding force. They can still release electrically with up to 35 lbs. of door "preload", or pressure exerted on doors by air conditioning systems, warping or misaligned hardware that can disable other electric strikes. New technology allows UltraLine strikes to operate at different voltages with one solenoid. A variety of faceplate sizes and finishes are available. Information: 800.87ADAMS, www.adamsrite.com.