Switches are commonly replaced parts in power tools.<br> 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.<br> Some common signs of a broken or failing switch are:<br> 1. Tool has completely stopped functioning - it not turn on<br> 2. Tool operates intermittently, requiring multiple tries on to turn on, until eventually it 't turn on at all<br> Variable speed function and electric aren't working properly<br> Trigger Switch Part Number 153609-00<br> This switch is a for the following for DW708 Cut Miter Saw Types 1, 3 & 4 ONLY.<br> Product Name:Trigger Switch<br> Part Number:153609-00<br> Applicable Model:For DW708 Cut Miter Saw Types 1, 3 & 4 ONLY.<br> Note:<br> Installation guide not included, we strongly recommend you professional installation.<br> Please check as much as possible to make sure the item is what you need.<br> Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use.<br> Colour:As Shown<br> Material:Plastic<br> Package Contents:<br> 1 * Trigger Switch<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.