This Trigger switch has 4 terminals and a locking mechanism for the switch. This genuine Makita replacement part is sold individually.
Switches are commonly replaced parts in tools. A switch handles on/off and variable speed operations. They also have a role in electric breaking; they can momentarily reverse electrical polarity. Because switches use mechanical internals, they will degrade and wear out over time, eventually needing replacement. Some common signs of a broken or failing switch are as follows:
The tool has completely stopped functioning
it will not start.
The tool operates intermittently, requiring multiple tries to turn on, until eventually it won’t start at all.
The variable speed function and electric braking aren’t working properly.