Spur washers are designed to securely fasten door hardware components, such as lock cylinders, escutcheons, or handles, to the door surface. They provide a stable and secure connection, preventing loosening or dislodgment over time. Spur washers feature a serrated or toothed edge design that grips onto the surface of the door, creating a secure and stable connection. This helps to prevent rotation or movement of the door hardware, maintaining alignment and functionality.