Designed to provide the benefits of a miter saw laser line generator without requiring time-consuming recalibration before each project, the DeWalt DWS7085 miter saw LED Work Light System casts a shadow from your saw blade onto your cutting surface, which acts as a guide. This allows you to cut quickly and accurately, and it makes alignment tasks easy. This system has the added benefit of illuminating your work surface for improved visibility, safety, and productivity. And it makes use of a separate power supply, so you can use it whether or not the blade is being operated. This LED system bolts onto the pre-wired power supply available on model DW713, DW715, DW716, and DW718 saws. It is backed by a 3-year limited warranty. more info