This thread chaser will quickly restore threads to near original condition without the use of expensive thread-cutting equipment. This set includes: 6 Standard dies: threads per inch - 4, 5, 6, 7, 7-1/2, 8, 9, 10, 11, 11-1/2, 12, 14, 16, 18, 20 and 24, replaceable v-pads and dies. 1 1/4" to 5" outer diameter. Metric die set is available and SOLD SEPARATELY. Metric die set sizes: 1mm- 1.25mm-1.5mm-1.75mm, 2mm-2.5mm-3.0mm-3.5mm; 4mm pitch dies.