Ardwolf A1 Biometric Fingerprint Keyless Door Lock with Keypad, Satin Nickel Designed in us, the a1 lock features a combination fingerprint scanner and a keypad The aardwolf a1 has self-learning ability, which enables the lock to update a user fingerprint template after every entry Removable key cylinder lets user to make key copies or re-key easily Reversible handle fit either left or right handed door Fits a USA standard 2-1/8" diameter hole with a thickness of 1-1/4" to 2-1/4" door