It's an aftermarket track. I bought it because the track comes in 50 inch pieces that can be connected together. I custom built the three sleds (Circular saw, Jig Saw and Router) to use the track as support. But there isn't anything from stopping you from using the track as a long straight edge and sliding the shoe of all the tools along it. It just takes a little finesse to keep the power tool tight to the slide and not let it wobble off.

The three sleds took about 45 mins to make the first one (fiddle-fiddle-fiddle-some-more-fiddle) and then the other two took about 15 mins each.