For all interior doors where a simple latch is all that is required. Plain knob on both sides. Turning either knob will retract latch bolt at all times to open door. Full 10 year mechanical warranty. 5 year finish warranty. No. 200T 3: 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. 200T 5: 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, antique brass (5) No. 200T 26D: 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, satin chrome (26D)