Your engine is constantly on the go, constantly spinning. The clutch is the system by which the engine is engaged and the car drives. It's the job of the clutch to create a smooth engagement between the engine and a non-spinning transmission.The clutch allows engine power to be applied gradually when the vehicle initially pulls away, it interrupts power to the transmission for gear change and stops the engine stalling when bringing vehicle to a stop. When clutch is fully engaged (clutch pedal fully raised) this allows power from the engine to the transmission creating drive at the wheels. When the clutch is disengaged (clutch pedal fully depressed) this stops the power from the engine to the transmission allowing the engine to keep running without creating drive to the wheels. Please check engine codes and BHP when looking your vehicle up on the website, if you have already removed your old unit you can check plate diameter and spline count to help identify correct parts.
Using a good quality clutch kit will improve the holding power of your factory transmission and clutch performance. Kits will generally include the clutch itself as well as a pressure plate, pilot bearing, throw-out bearing and the clutch alignment tool. Flywheels are usually sold separately.