Builder box pack. Key retracts bolt from exterior, turnpiece operates bolt from interior. Full 10 year mechanical warranty. 5 year finish warranty. No. 660-3K2: 2-3/8'' and 2-3/4'' radius corner adjustable latch (RCAL) radius corner strike, polished brass (3) No. 660 5K2: 2-3/8'' backset, 1/4'' radius deadbolt latch (RCL/S), keyed alike set of 2, antique brass (5) finish No. 660 26D AL K2: 2-3/8'' backset square face deadbolt latch, keyed alike set of 2, satin chrome (26D) finish