Ardwolf A1 Fingerprint Door Lock, Keyless Biometric Keypad Lock, with Reversible Lever and Automatic Locking, No Drills Needed - Aged Bronze Five ways to unlock: fingerprint, user code, user code + fingerprint, fingerprint + fingerprint, mechanical key. Reversible handle fit either left or right handed door; Reversing lever controlled by key; Removable key cylinder lets user to make key copy or re-key without bring the whole lock. Up to 100 fingerprints and 100 user codes capacity. Could add or delete individual users directly at the keypad without the use of a computer. Fit dimension 2-1/8" hole, no need to drill extra hole, fit door thickness between 1-3/8" and 2-3/8"