Descriptions:1.Material: Made of zinc alloy, with smooth finish, corrosion resistant, resistant to wear or tear, sturdy and durable, easy-to-grasp, ensure long service life.2.Advantages: Use on your bedrooms, bathrooms and other privacy needs. It can be locked inside with a turn button and unlocked outside with provided release tool. It be sure to add a touch of sophistication to your home.3.Installation: Tighten the the assembly screws with a screwdriver and complete installation. Keep the door knob hardware steady and securely attached. It fits both right and left handled doors.4.Note: Please carefully confirm the size to meet your needs before purchase. If our product has problem, please feel free to contact us anytime.Specifications:Color: WhiteMaterial: Zinc AlloyRound lock overall length: 162mm(6.