Trigger Switch 24/12A-125/250V for 651172-0, 651121-7, 651168-1 Item specifics: Voltage: 125/250V. Amperage: 24A/12A. Replaces forPart Numbers: 651172-0, 651121-7, 651168-1. 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: Tool has completely stopped functioning - it will not turn on; Tool operates intermittently, requiring multiple tries on to turn on, until eventually it won't turn on at all; Variable speed function and electric braking aren't working properly. This part is compatible with: for 5007S Circular Saw 5007NB Circular Saw 5008NB Circular Saw 5007FK Circular Saw 5007NBK Type 1 7-1/4" 15A Heavy-Gauge Aluminum Base Circular Saw GA6010Z 10.5A 6" Cutoff / Angle Grinder GA5010Z 10.5A 5" Angle Grinder 5057KB 7-1/4" Circular Saw GA5010 GA6010 Every Product from HASMX will enjoy 30 days Money-back and 18-Months worry-free warranty. If you're not sure whether it fits your model, please email us-includes your Models and serial number. Note - This is an aftermarket replacement Parts. Any brand name is used solely for the purpose of demonstrating compatibility.