Measure installed valve spring height conveniently and accurately. Simply install the height micrometer instead of a valve spring, and then rotate the clearly engraved dial to expand the tool to seat the valve, locks and retainer. Fits most 4 and 6 cylinder engines. Product Features:Model for 1.400-in. to 1.800-in. Valve SpringsFits Most 4 and 6 Cylinder EnginesReads in 0.005-in. IncrementsMaximum Retainer Size of 1.500 InHigh-Quality Aluminum Material
