Switches are commonly replaced components in power tools. A switch controls all on/off and variable speed functions and plays a role in electric braking by momentarily reversing electrical polarity. Since switches contain mechanical internal parts, they can degrade and wear out over time, eventually requiring replacement. Common signs of a failing or faulty switch include: 1. The tool has completely stopped working and will not turn on. 2. The tool operates intermittently, requiring multiple attempts to turn on, until it eventually fails to start at all. 3. The variable speed function and electric brake are not functioning 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 this part meets your needs. The product may vary slightly between batches, including minor design or color differences, which do not affect functionality. Color: As shown Material: Plastic Package Contents: 1 x Trigger Switch Note: Light reflection and display settings may cause slight color variations between the product image and the actual item. Measurement error allowance is +/- 1-3 cm.