As the industry leader, Kwikset has provided trusted security for over 60 years and has become synonymous with security, peace of mind, style and innovation. A clean, streamlined design on the Delta fits a wide range of decorating styles: from traditional and ranch to contemporary. Both knobs/levers can be locked or unlocked by a key on the outside, or turn button on the inside. The crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel.