Galvanised finish.Double thread restorers for internal and external threads, metric.Covering metric threads from M5 to M27.Pitch metric thread mm: 0.8, 1, 1.25, 1.5, 1.75, 2, 2.5 and 3.Metric thread mm: 5, 6/7, 8/9, 10/11, 12, 14/16, 18/20/22 and 24/27.For reconditioning male and female threads