In desktop systems, what replaces screws in a tool-less 3.5 inch hard disk bracket?

In tool-less designs for 3.5-inch hard disk brackets, plastic clips are commonly used to secure the hard drive in place without the need for screws. These clips allow for easy installation and removal, making it more convenient for users to upgrade or replace hard drives as needed. This method reduces the risk of stripping screws and simplifies the overall assembly process.

While metal pins, rubber stoppers, and magnetic locks are alternatives used in various hardware designs or configurations, they do not typically serve the purpose of securing hard drives in a tool-less bracket system. Plastic clips are favored for their effectiveness in providing a secure grip while making the installation process straightforward and tool-free.