Electrical Power Trigger Switch Replacement for Circular Saws and Grinders, L50 Aftermarket Trigger Switch replaces 651172-0, 651121-7, 651168-1. Trigger Switch Voltage: 125/250V, Amperage: 24A/12A. Compatible with: 5007S Circular Saw, 5007NB Circular Saw, 5008NB Circular Saw, 5007FK Circular Saw, 5007NBK Type 1 7-1/4inch 15A Heavy-Gauge Aluminum Base Circular Saw, GA6010Z 10.5A 6inch Cut-off / Angle Grinder, GA5010Z 10.5A 5inch Angle Grinder, 5057KB 7-1/4inch Circular Saw, 5007F 7-1/4inch Circular Saw with Brake, GA5010, GA6010. 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 braking; 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 to turn on, until eventually it wont turn on at all; variable speed function and electric brake arent working properly. Colour: Black Material: Plastic Package Contents: 1 x Trigger Switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.