Mechanical Knob Mortise Lockset Function Storeroom Lockset Grade 1 5SS55 Rose Style Satin Stainless Steel Lockset Finish Keyway Type Marks C Key Type Different Standards ANSI UL Listed ADA Compliant No Lockset Fire Rating 3 hr Backset 2-3/4 in Ligature Resistant Yes Item Ligature Resistant Lockset Location Type Education Government Healthcare High Abuse Applications Institutional Mental Health Facilities Military Number of Keys 2 Required Door Thickness 1-3/4 in