8101 - Yale 8100 Series Standard Duty Deadbolt (One side Deadbolt)8100 deadbolt series is an economical durable deadbolt, ideal for use as an auxiliary lock on residential applications.
8121 - Yale 8100 Series Standard Duty Deadbolt (Double Cylinder Deadbolt)8100 deadbolt series is an economical durable deadbolt, ideal for use as an auxiliary lock on residential applications.