For V-ribbed belts. When changing the ploy-V belt the permanent belt tensioning roller ca be loosended with the reaction wrench.
Application: VW Polo, Golf, Passat, T4 and Audi.
WARNING: California prop 65 - This product contains chemicals known to the state of California to cause cancer, birth defects or other reproductive harm. For more information go to https://www.p65warnings.ca.gov/