Necessary for pre-tensioning self adjusting clutches before removal or installation. Prevents plate distortion which may prevent the clutch from disengaging or cause dragging. Features a refitting tool allowing the clutch adjuster to be wound back and alignment adaptors. Suitable for 3 and 4 hole pitch. ALFA ROMEO: 147, 159, 166. AUDI: A3, A4, A6, A8. BMW: 320, 330, 520, 530. FIAT: ULYSSE, CROMA, DUCATO. FORD: MONDEO, S-MAX, GALAXY, TRANSIT. MERCEDES: C, E, CLS, S, CLK, SLK, SL. VW: PASSAT, GOLF, SHARAN, TIGUAN. Suitable for many other Makes & Models.