Brinks 2107-109 Ball Style Keyed Entry Door Knob, Antique Brass Meets ANSI Grade 3 standards for pick, drill and bump resistance Includes durable all metal construction and an anti-pry shield 4-way adjustable latch that fits any 2-3/8" or 2-3/4" backset and high security and exterior locking Bell knob fits all doors 1-3/8" to 1-3/4" thick Lifetime Warranty