Gemini is a combination smart deadbolt and latch system for commercial and residential use. It fits pre-bored doors with 1-3/8” to 2-1/8” thickness and 2-1/8” diameter holes spaced 5-1/2” apart. With Gemini, the door will always stay locked from the outside unless changed to passage mode, whereas turning the lever from the inside will automatically disengage the lock for quick exits. Product patented with the USPTO.