CDVI Compact 650Kg Electric Lock, Fire Rated, 12V The ML-350M-PL-12/24 provides fire certification, 650kg holding force and 225kg of preload operation. It is suitable for both horizontal or vertical mounting and double action door sets and features a bi-directional snib. Manufactured from stainless steel, this lock is fail safe and suitable for use on emergency escapes. With both lock status and door status monitoring it is easy to check the status of important doors. Tested to 250,000 cycles the ML-350M-PL-12/24 is a great solution for doors requiring solenoid type locking with fire certification and preload operation.