OTC's Belt Tension Gauge is designed to allow you to properly check belt tension on drive beltsCorrect tension ensures maximum belt and bearing lifeEasy to read dual scale reads 30-180 lbs. (2.5-15 ft. lbs.) and 130-800 NewtonsHigh-grade materials ensure quality performance over the lifetime of the toolFor use with belts on cars, trucks, SUVs, and motorcycles