These hinges generally come in two kinds: Snap Closing (sometimes Self Closing) or Free Swinging. The ones pictured above actually only come in snap closing, which is what you want. When the panel is close to being closed, the hinges snap closed the rest of they way, and you need to provide some small amount force to open them. The free swinging ones operate just like the ordinary hinges on your house doors. The snap hinges, combined with the significant weight of the control panel itself, keep the CP top stationary without the need for clips of any kind. (Of course, you do need a way to mount the whole CP to the cabinet!)