Master Lock BAO0115T ball knob style keyed entry door lock twin pack. Satin nickel finish. Six way adjustable latch fits all doors 2-3/8-inch or 2-3/4-inch backset, square, rounded corners or drive in.The SilvaBond antimicrobial protected finish on this Ball Knob Keyed Entry Lockset has proved to be very effective in controlling bacteria, mold and mildew on surfaces. Independent laboratory testing has confirmed the effectiveness of this long lasting and durable finish.