RECON 26417 Bed Rail Light Kit - Manual (Page 5)

I then placed the tube, taped to the jig, on my radial arm saw equipped with a dado blade
to make the holes for the light pods to stick through. You can cut these holes with a box
knife or coping saw but a dado makes a much cleaner level cut.
After using the dado a small portion of material exists (thickness of the tube wall) that
must be removed for pod to fit. This is the hashed markings in the picture below. These
need to be cut out so walls of tube are flat. And a dremel makes quick work of it.