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. Our innovative round design fits a standard 2-1/8 in. drilled door, allowing easy installation with a standard screwdriver. The crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel. This privacy function is best used in interior bed and bath applications where privacy is required. Both knobs/levers are locked or unlocked by turn button inside. The outside knob/lever can be unlocked by an emergency key. Size: 4.5 In.