1.Plain plug gauge,thread plug gauge,ring gauge 2.Material:HSS 3.Type:Various types (Metric,UNC,UNF,BSW) 4.Precision:5H,6G ... ,7H Thread plug gauge,plain plug gauge,ring gaugeFeatures ... : 1.Gauges:Thread plug gauge2.Material:HSS3.Type:Various types (Metric,UNC,UNF ...