Emtek 4415 Jefferson Single Cylinder Entrance Handleset - Brass TubularCan be ordered with any Brass Knob or Lever for the inside trimSold as a complete set. Includes Latch and Strike PlateStandard 2-1/8" Door Prep. Door Prep 5-1/2" Center-to-CenterSchlage C KeywayStandard latch is for 2-3/8" backset. Specify 2-3/4" backset if requiredHanding required if Lever used on inside or if Interconnect device is specifiedWeiser (WR5) KeywaySpecify by adding "W" to the beginning of Product Code for Weiser (WR5) Keyway. No upcharge for cylinder substitution. Can be keyed into existing Weiser system.Specifications:Backset: 2-3/8" or 2-3/4"Cross Bore: 2-1/8"Door Thickness: 1-3/8" to 2"Keyway: Schlage CHanding: Required specify left or right