... :Plug gauge and ring gauge 2.Material:GCr15 3.Type:Various types (Metric,UNC,UNF,BSW) 4.Precision:5H,6G,7H Metric Plug gauge and ... ring gaugeFeatures: 1.Gauges:Plug gauge and ring gauge2.Material:GCr153.Type:Various types (Metric ... ,UNC,UNF,BSW)4.Precision:5H,6G,7H 5.Measuring hole sizes and ...