Mechanical Lever Cylindrical Lockset Function Entrance Lockset Grade 2 Style QTL Sierra Lockset Finish Satin Chrome Key Type Keyed Different Standards ANSI A156.2 ADA Compliant Yes Lockset Fire Rating 3 hr Backset 2 3/4 in Ligature Resistant No For Use With Small Format Interchangeable Core Handle Material Zinc Includes Hardware Item Lever Lockset Performance Strength Medium Duty Number of Keys 0 Required Door Thickness 1-3/8 in to 1-3/4 in Series QTL200