This Weiser Troy hallway door knob features a brass design, a classic satin nickel finish and a latch that can be adjusted from 2 3/8" to 2 3/4". The knob can be installed on any 1 3/8" to 1 3/4" thick standard door. It includes the exclusive SmartKey technology allowing you to modify your lock to fit with the key of your choice. This product features Microban(R) antimicrobial technology, preventing microorganism growth on surfaces. Limited lifetime warranty.