Kwikset 300T 26D CP Tylo Bed and Bath Knob, Satin Chrome The product is manufactured in china The product is highly durable and easy to use Easy installation and easy handling For use on interior doors where privacy is required, such as a bathroom or bedroom 2-3/8 inch to 2-3/4 inch adjustable backset Fits door thickness of 1-3/8 inches to 1-3/4 inches Lifetime finish and mechanical warranty 10-year mechanical and 5-year finish warranties