Emtek 7143 STRETTO Narrow Trim Lockset, 1-1/2" x 11" Concord Non-Keyed, Brass Tubular, Passage Can be ordered with any Brass Knob or Lever Sold as complete set. Includes Latch and Strike Plate Narrow 1-1/4" Door Preps, 3-3/8" C-to-C Hole Spacing Supplied with 28 Degree Latch Standard backset is 2-3/8" backset. Specify 2-3/4" backset if required. Handing required for Leverset Specifications:Backset: Adjustable 2-3/8" or 2-3/4"Cross Bore: 2-1/8"Door Thickness: 1-3/8" to 1-3/4"Latch Faceplate: Round or Square CornerMaterial: Brass