A safe with a biometric lock uses personal information like fingerprint or optical scanning to unlock the safe. A biometric safe's lock can store multiple fingerprints and optical scans for anyone authorized to access the safe. Within Medium Safes we carry 5 products with a biometric lock mechanism and various features such as Fireproof, Waterproof and Impact. Check out the best-selling product, the 1.6 cu. ft. Depository Money Safe with Digital Lock from SentrySafe.