Halifax Square Double Cylinder Deadbolt SmartKey W/ RCAL Latch and RCS Strike KA3 Satin Nickel Fin (Discontinued)

Double Cylinder Function: The deadbolt is thrown and retracted by a key from either side. As you will not be able to unlock this from the inside without a key, please check your local fire code to ensure this is allowed before purchasing.BumpGuard: Lock bumping is an attack technique used to defeat conventional pin and tumbler locks. Kwikset's BumpGuard component utilizes a patented side locking bar which replaces the traditional pin and tumbler design providing protection against lock bumping.