Upgraded 2.0 Mechanical Lock Keypad: Update your code directly using the handle and keypad without removing the lock. Unlock with a simple mechanical code—no electronics to worry about, and clear input with the C key for quick corrections Reliable Security without Batteries: This double-side mechanical keyless door lock operates without batteries or wiring. It supports 4-7 digit codes using numbers and the letters X and Z, with any-order entry for added security against code guessing Fits More Door Types: This mechanical keyless entry door lock comes with 4 spindles (fits 1.4"-2.5"/35-65mm door thicknesses) and 2 latch sizes (2.3"/60mm & 2.7"/70mm) for varied door depths. It is compatible with metal fence doors and wooden doors Controlled Access with Easy Family Passage: Dual-sided code control helps manage entry from both sides of the door. When family members move in and out frequently, the mechanical door lock's hold-open mode allows smooth access without repeated unlocking

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