Mechanical Knob Cylindrical Lockset Function Classroom/Privacy Lockset Grade 2 Ball Style Satin Stainless Steel Lockset Finish Keyway Type None Key Type Not Keyed Standards ANSI A156.2 ADA Compliant No Lockset Fire Rating 3 hr Backset 2-3/8 in Ligature Resistant No For Use With Wood or Metal Doors Item Knob Lockset Knob Material Wrought Brass Location Type Commercial Lockset Performance Strength Medium Duty Number of Keys 0 Pins 0 Required Door Thickness 1-3/8 in to 1-3/4 in