I use this flashlight a lot while I am working.  It is great to use when I am working on plumbing and have to look into a tight space or while inside of a bathroom or kitchen cabinet  This is a nice accessory to use with your 18VDC Dewalt tool. You just snap it onto the Dewalt battery that now acts as a solid heavy base and you can twist the flashlight head to aim it at your work I recently used it under a sink to aim at the pipes as I did some plumbing with both hands free.  I like how it stays where you set it and the beam doesn't move around while you are working.  It sits solidly in place and frees up your hands.