This thread chaser will quickly restore threads to near original condition without the use of expensive thread-cutting equipment. Replaceable V-pads and dies. 1-1/4 in. to 5 in. O.D. 6 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. No. 216884 - Standard die set. Includes 6 dies, in the sizes listed above. No. 202817 - Metric die set. Includes three dies: 1mm- 1.25mm-1.5mm-1.75mm, 2mm-2.5mm-3.0mm-3.5mm; 4mm pitch dies.