Selle Italia offers a seatpost that works with standard rails as well as Selle Italia Monolink Rail System found on many of their saddles.  Selle Italia created the post to address the needs of cyclists looking for an easy clamping system that is light, easy to use and quite secure.  The Monolink Seatpost addresses the issues and gives you a sleek looking post that works with 99% of road saddles on the market.