Brinks 2711-119 Bell Style Door Knob with Privacy Key for Bedroom and Bath, Satin Nickel Durable, all metal construction, bell interior locking door knob for bedrooms and bathrooms in satin nickel. 4-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. Lifetime warranty for defects in material or workmanship. Bell knob fits all doors 1-3/8" to 1-3/4" thick Perfect for use in the bedroom or bath Comes with a privacy key to unlock from the outside if necessary 4-way adjustable latch that fits any 2-3/8" or 2-3/4" backset Lifetime Warranty