Keyed Matte Black Doorknob By Joko, Square Bedroom Door Lever,, Heavy Duty. With ANSI Grade-3, Exceeds 250,000 cycles .The solid zinc alloy and brass for strength and security. No need for professional door fitters, you can do it yourself! Matte Black Finish long-lasting product life. Heavy-duty door handle is made of premium quality zinc alloy and brass parts to guarantee rust-free in a high humidity environment. We provide 30-day money back and lifetime warranty. 100% Satisfaction Guarantee for risk-free shopping! Adjustable latch 2-3/8?? - 2-3/4?? (60-70mm) backset. Door thickness from 1-3/8?? to 1-3/4?? (35-45mm) door knobs includes three keys per set This matte black door handle works great for bathrooms, bedrooms, offices, and rooms that require privacy. Note?Please carefully confirm the size to meet your needs before purchase,If there is any quality problem with your purchasing, please contact us.