Privacy Function(Not Key Lock): The Latch Bolt Can Be Locked By Thumb Turn Button On The Inside Knob. An Emergency Release Tool Can Unlock The Door From The Outside. This Function Is Ideal For Bathroom Or Bedroom Doors Where Privacy Is Desired But A Keyed Cylinder Isn'T Necessary. .Features: Door Knobs For Both Left And Right Handed Doors; Material: Mental; Finished Colour: Black Finish; Privacy Function(Doors Can Be Locked Inside And Opened Outside In Emergency Without Keys). .One Size Fits Most: Knob Diameter: 57Mm; Rose Base Diameter: 65Mm; Adjustable Latch (The Distane Of Hole Center To The Door Edge) - 60Mm Or 70Mm; Fit For Door Thickness: 35Mm To 45Mm. .Beautiful Black: Its Not Just A Door Lock - Its A Statement Piece. These Gorgeous Door Knobs Are Black Finished And Sure To Add A Touch Of Sophistication To Your Home. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.