Size difference: One of the primary distinctions between the SDL-SS1 and SDL-S1 smart door locks is their size. The SDL-SS1 is 35mm wide, while the SDL-S1 is 43mm wide. This size difference can have implications for installation and compatibility with different door types. Key cylinder and internal snib: The SDL-SS1 features a separate key cylinder and an internal snib. When locked, the internal and external panels of the lock are secured, preventing access even with a valid code. This additional level of security may be preferred in certain situations. Built-in key cylinder: In contrast, the SDL-S1 comes with a built-in key cylinder. This can be more convenient for retrofitting purposes, as it eliminates the need for an additional key cylinder installation. Protrusion distance: Another difference between the two models is their protrusion distance from the door. The SDL-SS1 has a protrusion of only 52mm, while the SDL-S1 extends 69mm from the door. This distinction is particularly relevant when installing the lock on a main door with a screen door in the front. The smaller protrusion of the SDL-SS1 allows for more space between the doors, reducing the chance of interference or damage.
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