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This Trigger switch has 4 terminals, a heat sink and a forward/reverse lever. This genuine Milwaukee replacement part is sold individually.
Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions. They also have a role in electric breaking; they can momentarily reverse electrical polarity. Because switches use mechanical internals, they tend to degrade and wear out over time, eventually requiring replacement.
Some common signs of a broken or failing switch are:
This part replaces obsolete part 23-66-0470