Material:Stainless Steel; Black Finish; Modern Flat Ball Style Privacy Knob Door knob material stainless steel, black finish, classic flat ball style privacy knob 10 door knobs per package (for 10 doors). Privacy function, without keys. Can be locked inside with thumb turning button. When locked inside, the knob could be opened outside with coin or flat screwdriver. Perfect for interior doors like bathroom and bedroom The bedroom door knob is designed for standard door. Solid latch length (the distane of hole center to the door edge) 2-3/8" or 2-3/4" (60mm or 70mm). The interior door knob fits standard door board thickness 1-3/8" to 1-3/4" (35mm-45mm). Round rosette diameter 65mm The interior door knob is pretty easy to install without any professional assit. The black door knob is easy to replace the old ones. Package includes door knob and accessories (latch, strike plate, screws, installing instruction) The door knob is with classic flat ball knob and round rosette, no compatible with sharp edges, comfortable and security for daily using. Durable and long lasting for daily use, confirm with ANSI Grade 3, Exceeds 200,000 cycles door knob is universal for left-handed or right-handed doors. Each knob is packaged separately to avoid scratches during transit Material:Stainless Steel; Black Finish; Modern Flat Ball Style Privacy Knob Door knob material stainless steel, black finish, classic flat ball style privacy knob 10 door knobs per package (for 10 doors). Privacy function, without keys. Can be locked inside with thumb turning button. When locked inside, the knob could be opened outside with coin or flat screwdriver. Perfect for interior doors like bathroom and bedroom The bedroom door knob is designed for standard door. Solid latch length (the distane of hole center to the door edge) 2-3/8" or 2-3/4" (60mm or 70mm). The interior door knob fits standard door board thickness 1-3/8" to 1-3/4" (35mm-45mm). Round rosette diameter 65mm The interior door knob is pretty easy to install without any professional assit. The black door knob is easy to replace the old ones. Package includes door knob and accessories (latch, strike plate, screws, installing instruction)