Adams Rite 7440 series satin stainless zinc-aluminum alloy ultraline electric strikes for wood or hollow steel jambs and doors. Case measures 1-inches by 3-3/8-inches by 1-1/16-inches deep. Strike opening measures 5/8-inches by 1-7/16-inches by 1/2-inches deep. Bolt retainer jaw is made of stainless steel. Strike lip: basic 7400 strike has lip of proper length for 1-3/4-inches thick door that closes flush with jamb edge. Faceplate measures 1-1/4-inches by 4-7/8-inches. It has flat faceplate. Function: remote electrical control of any door equipped with "key-in-lever/cylindrical" type latchsets listed above. Electrical actuation unlocks strike jaw, releasing latch bolt, so door can be opened without operating latch itself. Extremely compact mechanism fits into jamb sections as shallow as 1-1/16-inches. Fits existing preps for 7840AN and 7850/7040/7140. ANSI/BHMA type E09321 (grade 1). Intertek listed for burglary resistance (UL1034). 12 volts AC/VDC or 24 volts AC/VDC voltage.