Feature TIME & MONEY SAVER -- External Capacity：1-1/4” to 5” inch O.D. Eliminates the need for expensive thread-cutting equipment. FUNCTION - Immediately Save, Repair & Bring Damaged Threads Back to life. Quickly restore threads to near original condition. BENEFITS -- The die cast alloy V-pad will not damage the threads. V-pads and dies can be replaced when worn out. WHAT YOU GOT -- Thread chaser includes 6 dies (No.216884) : threads per inch - 4, 5, 6, 7, 7-1/2, 8, 9, 10, 11, 11-1/2, 12, 14, 16, 18, 20 and 24. .