Adel Keyless Biometric Fingerprint Passcode Door Lock Trinity 788 with LED Display Unlock by Fingerprint, Passcode or Key. Fits a USA standard 2-1/8" diameter hole with a thickness of 1-5/32" to 2-3/8", a small extra hole need to be drilled on door. Easily add or delete individual users directly on the lock. Up to 99 fingerprints capacity. Reversible handle fit any left or right handed door.