Brinks 4312-109 Barrett Style Privacy Knob, Antique Brass Durable, all metal construction interior locking door knob for bedrooms and bathrooms in antique brass 6-Way adjustable latch that fits 2-3/8" or 2-3/4" backsets Fits all standard doors 1 3/8 inch to 1 3/4 inch thick Lifetime warranty for defects in material or workmanship Simple to install, internal screw guide posts, uses only a Phillips screwdriver