Contemporary Style Passage Function Door Knob Set; No Locking Mechanism, Both Inside And Outside Always Open Door; Ships With Mortise Latch (Not Drive In); Latch Face 1 Inch X 2 1/4 Inches X 1/4 Inch Radius Corners; Optional Drive In Latch Available, 1 Inch Diameter, (Product Number # 87398); Fits Doors 1 3/8 Inches To 1 3/4 Inches Thick; Fits Doors With Backsets 2 3/8 Inches Or 2 3/4 Inches; Fits Doors With A 2 1/8 Inch Cross Bore; 5-Year Mechanical And Finish Warranty; ANSI Grade 3; Fabricated With Brass Knob And Steel Mechanism; Chrome Finish.