Mechanical Digital Lock w. Hold Back Function Simply installation Easy to program, operates using a single PIN code Suitable for light-duty and internal use Spindle can be cut down on-site to suit doors 30mm to 60mm thick Supplied complete with mortice tubular latch and internal knob unit Hold-open function provided by snib on internal turn knob unit 14 digit keypad offers 8000 codes of 4 to 7 digits 5-year guarantee Briton 9160 Series: This popular light-duty push-button code lock with mortice and optional hold-open function is a simple means of securing a door that requires restricted but convenient access