Mechanical, Lever, Cylindrical, Lockset Function Classroom, Lockset Grade 2, Style QTL Sierra, Lockset Finish Satin Chrome, Key Type Different, Standards ANSI A156.2, Yes, Lockset Fire Rating 3 hr, Backset 2 3/4 in, Ligature No, For Use With Small Format Interchangeable Core, Handle Material Zinc, Includes Hardware, Item Lever, Lockset Performance Strength Medium Duty, Number of Keys 0, Number of Pins 6, Required Door Thickness 1-3/8 in to 1-3/4 in, Series QTL200