This Aftermarket Trigger type switch has 4 internal terminals and replaces Milwaukee 14-78-0525 switch. It is a10A/125V Over Hang Trigger Switch without lock with integrated dust proofing commonly used in high rated bench top and power tools.

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.

NOTE: Some common signs of a broken or failing switch are:

• Tool has completely stopped functioning - it will not turn on
• Tool operates intermittently, requiring multiple tries to turn on, until eventually it won't turn on at all
• Variable speed function and electric braking aren't working properly