Re-engineered clamp with an optimised centre-loaded bolt design equalises load distribution to ease position adjustments. With this clamp set you will be able to clamp metal 7x7mm saddle rails and Specialized FACT carbon 7x9mm saddle rails.> 7x7mm and 7x9mm replacement clamp set for all Specialized road seatposts equipped with a single-bolt cylindrical wedge clamp design> New design clamp for better clamping and non-slipping of the saddle