Builder box pack. For bedroom and bathroom doors. Turn button on interior knob. Turning button locks both knobs. Lock may be opened by an emergency entry key in exterior knob. Full 10 year mechanical warranty. 5 year finish warranty. No. 300T 3: 2-3/8'' backset, square face plain latch, polished brass (3) finish No. 300T 3X26 RCL RCS: 2-way steel adjustable latch (AL), interchangeable for 2-3/8'' or 2-3/4'' backsets, drive-in (round), radius, or square face plain, polished brass (3) x polished chrome (26) No. 300T 3 6AL RCS: 6-way steel adjustable latch (AL), interchangeable for 2-3/8'' or 2-3/4'' backsets, drive-in (round), radius, or square face plain latch, polished brass (3) No. 300T 5: 2-3/8'' steel backset, radius corner latch, antique brass (5) finish