These two models allow you to hang a curtain using hooks instead of threaded around the rail like it is meant to be hung. This was useful for me because the curtain was just a little too short for my sliding glass door, and the hook also makes it slide a lot easier along the rail.

The double hook allows you to connect two curtain panels together with an overlap so that they always move together.

Figured I'd upload it since others might also find it useful.

Designed for the typical 1 inch rods you would find at that one popular home goods store. :)