The Von Duprin 6400 is a modular electric strike designed for mortise and cylindrical locks. This versatile strike allows the installer to insert and lock in the deadbolt keeper or plug and deadlatch ramp anywhere within it's 3-1/8" vertical opening to fit the latch position and functional needs. This combined with a 1/8" horizontal adjustment, makes this strike a good fit for installations where misalignment or a tight fit are a problem. Vertical adjustments allow for alignment with a wide variety of mortise locks with offset latches. Horizontal adjustment of up to 1/8" improves fit on tight door preps. Can accommodate up to 1" deadbolt (for night latch only). Plug-in voltage connectors are included for ease of installation and removal during strike servicing. Non-handed. Unique internal solenoid design prevents keeper from heating up. UL1034 rated for burglary-resistance.