Product Description: 1. Time & Money Saver -- External Capacity: 1-1/4" to 5" inch O.D. Eliminates the need for expensive thread-cutting equipment 2. Function -- Replace OTC 7402 & 202817 Metric Die Set. Immediately Save, Repair & Bring Damaged Threads Back to life. Quickly restore threads to near original condition 3. Easy to Use -- Just tighten the tool slightly on the good threads, and then back off over the damaged thread area to restore the threads 4. Benefits -- The die cast alloy V-pad will not damage the threads. V-pads and dies can be replaced when worn out .