Sargent & Greenleaf announces the launch of the revolutionary I-Series Keypad for safe security Sargent and Greenleaf (S&G), a global manufacturer of high security locks and locking systems, announces ...

Sargent and Greenleaf, Inc. (S&G), a division of STANLEY Security, announces the S&G® Model 2890B Pedestrian Door Lock (PDL) – the first lock of its kind in the security industry designed to meet U.S.