I bought some of these with the bigger tracks to put them into and i tried the t-bar track in my Rigid TS3650 saw miter track and they fit like a glove. So I am at some point going to get some more of it to replace the wooden runners on my current sled. The only dowside if there is one is that the t-bar track is captive in the miter slot so you have to guide the sled into the slots when you want to use the sled which is a minor drawback. The thing I like is that they really fit beautifully and slid inside the miter track like greased lightning. The one thing that I am not sure about is whether or not it will still slide nicely once tightened down to the bottom of a sled. The t-bar track doesn't seem to sit proud of the saw top at all so it might just be too snug once tightened down.