Standard 2 1/8” Door Prep Standard latch is for 2 3/8” backset. Specify 2 3/4” backset if required. C Keyway. Knob dimensions: 2 1/4” diameter x 2 3/8” projection x 1” stem Call for Custom Order. Single Cylinder. Full length tubular entry. Exterior Projection is 3”. Interior Projection Depends on Handle Style. Overall Grip thickness: 3/4”. Clearance between door & grip is 1 5/8”. Plates thickness: 1/2”. Standard Door Thickness: 1 3/4”- 2 1/8” Standard Components: 1 1/2” Rosette Screws, Double Cylinder Tailpiece, Outside Entry Spindle, Inside Passage Half Spindle, 2 1/4” Deadbolt Mounting Screws, Full-Lip Strike Plate, Deadbolt Strike Plate.