Plain knob on both sides with no locking mechanism Perfect for interior doors Either knob will retract latch bolt at all times Easy to install 2-3/8 to 2-3/4 adjustable latch 1-3/8 to 1-3/4 standard door thickness 1 x 2-1/4 round corner faceplate 2-1/4 full lip round corner strike 3/8 throw Reversible for right or left hand doors