When you are locked inside, the outside can unlock the door with a coin or slotted screwdriver, no key is needed. SPECIFICATION: Fit standard door thickness: 1-3/8"to 1-3/4"(35mm-45mm) and adjustable latch 2-3/8"or 2-3/4"(60mm-70mm), the latch plate is non-detachable.
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