As a global leader in security-related products and services, the Brinks name is synonymous with top quality merchandise designed to keep you, your family and your valuables safe. In keeping with this tradition, our keyed entry, all metal constructed Tulip style doorknobs meet ANSI Grade 3 standards for pick, drill and bump resistance and include an anti-pry shield with a 4-way adjustable latch that fits any 2-3/8" or 2-3/4" backset. Built with a square spindle drive for easy installation and strength, our Tulip knob fits all doors 1-3/8" to 1-3/4" thick and includes a lifetime warranty.