This is a switch mount for the Hobbywing ESCs. The known supported models are the Max5 (45mm fan), Max6 (35mm fan) and Max8v2 (30mm fan).
The PPS Switchfork Switch Mount is made in the USA from 6061 Billet Aluminum, and includes all necessary hardware to mount your switch directly to your stock Hobbywing ESC. No more floppy switches, or double sided tape that for some reason won't stay stuck no matter how clean you got it....
If you have a Hobbywing ESC not listed, and it has the same switch as in the photos and a matching fan size, you could make it work!