Wcs 1 bolt inline matte carbon seatpillar patented sidebinder clamp design uses a single 5mm bolt for quick secure adjustment precision forged alloy clamp assembly for strength low profile head for optimal saddle clearance and sleek lines wide saddle clamp reduces stress on lightweight saddle rails interchangeable clamps provide compatibility for all popular rail sizes specification monocoque carbon construction 0mm offset 7x7mm saddle rail clamp included saddle clamp torque spec 12nm matte ud