These switches do what they're supposed to, but work in reverse. The images in the listing show that the switch will light in either position depending on which image you are looking at. I assumed the picture of the "on" and "off" positions to be correct, but it's upside down (the LED lights up when it's up, not flush). Otherwise they seem to be good. I would be suspicious of the 20A rating and would definitely do thorough thermal testing if your project approaches that load level.
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