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 single-sided 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: The cuttable spindle adapts to 1.4"-2.5"/35-65mm door thickness, while two latch sizes (2.3"/60mm & 2.7"/70mm) fit different door depths. The lock can be mounted on both left-hand and right-hand doors Two Access Modes for Busy Spaces: This mechanical door lock features a hold-open mode to keep the door freely passable during high-traffic hours. The code-free mode allows quick entry with a simple handle turn—saving time when your hands are full