These mortise door latches, unlike a tubular latch style door latch, give you that crisp feel of a secure, solid, tight fit when closed. That nice "click" that let's you know the fitment is perfect. Mortise latches are also very durable, which makes them the best for heavy use, perfect for a front or rear door on your home. Without sacrificing style. This is a Solid Brass construction mortise lockset for screen doors, patio doors and storm doors. It has a door lever and thumb turn lock on the inside, and a door knob on the outside. 1-1/2" Backset 7/8"- 1-3/4" Door Thickness range 6"x 1-1/2" Extruded brass escutcheon back plates 3-1/4"x 3/4" Face Size Reversible Handing 1-3/4" solid brass knob projection 2" solid brass lever projection