The Emtek 5100 Waverly Key in Knob Lock Set in Satin Nickel is a modern and stylish entry door lock set suitable for residential use, such as bedroom or bathroom doors. Made of brass with a satin nickel finish, this lock set features a round shape with a rope knob and a 2 3/8" backset. It includes instructions and a key for easy installation and operation. The key in knob design adds a unique and functional touch to the set, making it a secure and decorative choice for any home.