Emtek 3545 Mormont Brass Mortise Entrance Lockset - Entry Set- Can be ordered with any Brass Knob, Crystal and Porcelain or Lever- 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 LocksSpecifications: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