1.Gauges:plain ring gauges 2.Material:GCr15 3.Type:Various types (Metric,UNC,UNF,BSW) 4.Precision:5H,6G,7H Metric plain ring gaugesFeatures: 1.Gauges:plain ring gauges2.Material:GCr153.Type:Various types (Metric,UNC,UNF,BSW)4.Precision:5H,6G,7H 5.Measuring hole sizes and depths6.Checking distances between holes7.Size:Standard or as requireIf you have any question ,please feel free to contact with ...