Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions and plays a role in electric braking by momentarily reversing electrical polarity. Since switches have mechanical components, they can degrade and wear out over time, eventually requiring replacement. Common signs of a broken or failing switch include: 1. The tool has completely stopped functioning and will not turn on. 2. The tool operates intermittently, requiring multiple attempts to turn on, until it eventually fails to start. 3. The variable speed function and electric brake are not working properly. Trigger Switch Part Number: 153609-00 This switch is compatible with the DW708 Cut Miter Saw Types 1, 3 & 4 ONLY. Product Name: Trigger Switch Part Number: 153609-00 Applicable Model: For DW708 Cut Miter Saw Types 1, 3 & 4 ONLY Note: Installation guide is not included. Professional installation is strongly recommended. Please verify compatibility to ensure the item meets your needs. The product may vary slightly between batches, including minor differences in color or design, which do not affect functionality. Color: As shown Material: Plastic Package Contents: 1 x Trigger Switch Note: Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.