Halifax Square Single Cylinder Deadbolt SmartKey W/ RCAL Latch and RCS Strike Bright Chrome Finish (Discontinued)

Single Cylinder Function: Single Cylinder function specifies that the deadbolt is thrown by a thumb turn on the interior while the exterior uses a key for locking and unlocking.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.