Kwikset 780-S.STRKP 780 Single Cylinder Keyed Entry Deadbolt with SmartKey from the Signature Series Polished BrassKwikset 780 S. STRKP 780 Single Cylinder Keyed Entry Deadbolt with SmartKey from the Signature Series Single Cylinder: Single cylinder deadbolts are keyed on the exterior with an associated thumb turn on the inside that can quickly and easily lock or unlock the latch mechanism. Single cylinder locks are most commonly used to secure entrances to a residence or place of business. Features: Tested to exceed ANSI BHMA Grade 2 security requirements