Schlage 'F' Locks Double Security Sets. Standard Duty Residential Entry Locks & Deadbolts. Keyed alike and packed together. Furnished w/ 4 keys. Backset: 2-3/8". Entry Lock comes with a full lip strike, 10-026. The B60 is a medium duty Grade 1 deadbolt with additional security reinforcement. Comes with "SK" Security Key.