The Master Lock No. 4901DLH Series Biometric Lock Allows You Complete Control Over the Padlock Through Bio Metric Access - Your Finger Is the Key! The Master Lock 4901LH Bio-Metric Interface Provides the Ultimate Ease-of-Use and Convenience, With No Keys to Lose or Combinations to Remember. The 4901DLH Padlock Supports Up to 10 Fingerprints for Multi-User Access.