Adams Rite 7140 series clear anodized zinc-aluminum alloy electric strikes for wood or hollow steel jambs and doors. Case measures 1-inches by 3-3/8-inches by 1-5/8-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 7140 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, with square corners. Fail secure: field convertible from one mode to the other. However, AC intermittent solenoid must not be used continuously in either. Function: remote electrical control of any door equipped with cylindrical (key-in-knob/lever) 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 1-5/8-inches. ANSI/BHMA type E09321 (Grade 1). UL listed for burglary resistance. 12 volts DC voltage.