Dimensional accuracy, stability and good adjustability.
When the bundled seatpost my bike saddle would not hold because of the single-screw system, I got myself this replacement. Two screws are usually systems. stable and adjust better, so what more could you want?
The seat post is a bit long about 400mm, the saddle sits 40-41 cm from the end of the seat post, the minimum length to be immersed is a good 10 cm.
