Switches are commonly replaced parts in power tools. A switch handles all on/off and variable speed functions. They also play a role in electric braking by momentarily reversing electrical polarity. Because switches use mechanical components, they tend to degrade and wear out over time, eventually requiring replacement. Common signs of a broken or failing switch include: 1. Tool has completely stopped functioning and will not turn on 2. Tool operates intermittently, requiring multiple attempts to turn on, until it eventually fails to turn on at all 3. 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 not included. Professional installation is strongly recommended. Please verify compatibility to ensure the item meets your needs. Tips: Product design may be updated periodically. Due to different production batches, slight variations in appearance or color may occur. These differences 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 the color of the item in the image to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.