Linear motion kit

Do the pieces of the linear motion kit slide together like the previous model ( linear slides )? In the picture online it shows that the linear slides do go together but in the linear motion kit it does not show that or mention it.

The metal pieces in the 276-1926 Linear Motion Kit do not slide together.
These metal pieces are rails that the plastic pieces slide on.

The old linear slides are still available:
These have 2 metal pieces sliding together.

Let us know if you have any further questions.