Mechanical, Knob, Cylindrical, Lockset Function Entrance/Office, Lockset Grade 2, 4600 Ball Style, Bright Brass Lockset Finish, Keyway Type Yale Para, Key Type Different, Standards ANSI A156.2, Series 4000, No, Lockset Fire Rating 3 hr, Backset 2-3/4 in, Ligature No, For Use With Steel Doors and Frames, Wood Door with Wood or Steel Frames, Item Knob Lockset, Key Material Nickel Silver, Knob Material Wrought Brass, Lockset Performance Strength Medium Duty, Number of Keys 2 WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)