Emtek 3343 Charleston Brass Mortise Entrance Handleset – Entry Set Can be ordered with any Brass Knob or Lever for the inside trim Sold as complete set. Includes Latch and Strike Plate 2-1/2″ or 2-3/4″ Backsets Standard Mortise Door Prep ANSI A115.1 UL Listed Mortise with ANSI F20 or F13 Function Schlage C Keyway Handing required for All Mortise Locks Specifications:Backset: 2-1/2″ or 2-3/4″Door Prep: Standard Mortise ANSI A115.1UL Function: ANSI F20 or F13Door Thickness: 1-3/4″ standard (specify if thicker)Keyway: Schlage CHanding: Required specify left or rightFire Rating: UL 180 minute