Taper Gauge Used to check taper angles on tapered shafts / holes by blue matching.Gauging steps provided on the major / minor diameters to check the diameters.Standard taper plug / ring available in :MORSE TAPER : MT1 / MT2 / MT3 / MT4 / MT5 / MT6.SELF RELEASE TAPER : ISO 30 / ISO 40 / ISO 45 / ISO 50.Special taper / Indicative type taper gauges available on request.