Passage for interior doors, plain knob on both sides. Turning either knob will retract bolt at all times to open door, dual-option spring latch (drive-in and radius faceplates) standard. 1/4" radius full-lip strike. Adjustable backset (2-3/8" to 2-3/4"). Fits standard door preps. 25 year mechanical warranty. 5 year finish warranty. ANSI Grade 3 security and performance. Reversible.