Make sure this fitsby entering your model number. To prevent the damage of the lock caused by the improper locking position. To align the position of the magnetic plate and the bolt in a short time, which can reduce the relock time of the electric bolt Fail Safe: Unlocked when power is removed, with all-metal construction.with 304 stainless steel solid bolt and 4409lb holding for It can operate at the temperature of 60 ℃(140℉) or -40℃(-40℉) below zero based on the all-metal linkage parts. With the diversified design of durable magnetic valve, special photoelectric control system, ultra-low temperature and power consumption design, anti-intrusion and smart circuit.