This is a complete seat binder assembly for a BMC Pro Machine SLC 01. It is compatible only with the Pro Machine, and no other frame model. BMC recommends that you torque the upper bolt to 5Nm (35-40 in/lbs), and the lower bolt to 7-8Nm (62-70 in/lbs). More specifically, BMC suggests that you first torque the lower bolt to 8Nm, followed by the upper bolt to 5Nm. Once you bring the upper bolt to 5Nm, re-tension the lower bolt up to 8Nm to regain the torque lost due to equalizing the pressure distribution on the clamp.