ANSI Grade-3 Security Privacy Ball Knob, Fits door thickness of 1-3/8 in to 1-3/4 in Anti-saw rolling steel pin for durability and increased security Easy Installation; instructions enclosed, Easy to install with all accessories included. One person can do it 4-way latch adjusts to fit 2-3/8 inor 2-3/4 in backset, Material: Stainless Steel; Ball Knob Entry Door Knobs For use on interior doors such as a bedroom or bathroom, front door knob, fits both right handed and left handed doors Backed by an Cielsa Dawn 1-year limited warranty