CTA Tools 2879 Audi Camshaft Locking Tools is expertly designed and crafted to the exacting quality standards expected from CTA Tools. Engineered specifically for use when servicing vehicle Models Audi S4, A6, A8 and all-road Quattro engines. The Audi Camshaft Locking Tools is ruggedly designed and easily keeps TDC timing alignment when servicing cam belts. Whether tuning up your '68 Corvette or changing the oil on a John Deere tractor, CTA can supply you with the tools needed to do the job. California Prop 65 - Warning, This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.