What stands out about this relay is the stable performance across varied voltages, which gives your circuit a consistent feel.
American Zettler AZ2160-1A,15DEF – 30A Miniature Power Relay (Pack of 2)
A nice touch is how the relay sits snugly in the socket, so you won't worry about loose connections during long projects.
You will find that the drum switch makes it easy to switch modes without fumbling or confusion.
A neat benefit is the Switch Harness Set, and the connectors seat firmly without much force.