This product was a complete disappointment. The thread repair kit failed to fix the issue and left me with a damaged thread.The only pro was the ease of use, but that didn't make up for the fact that it didn't work. A waste of money..
Pros
Easy to use and can save time and money compared to replacing the entire part.
Cons
May require some skill or experience to use properly, resulting in improper repair if done incorrectly.
Based on my observations, this thread repair kit was completely useless. The tool was difficult to use and the instructions were vague and unclear. The only positive aspect was that it came with multiple thread sizes. However, that benefit was outweighed by the fact that none of them worked effectively. Save your money and find another solution for your thread repair needs. .
Pros
Easy to use and repair damaged threads quickly and efficiently
Cons
Requires prior knowledge of thread repair and may damage the surrounding area if not used correctly
Due to circumstances I did not purchase them from Revain but the result would have been the same. This is a MUST if you are an amateur engine builder. Those of us who have had to deal with this know that the cylinder head bolt holes on the block can collapse and need to be recut for a coiled coil or similar use. THEY PERFORM, ACHIEVE AND HOLD THE TORQUE BETTER THAN THE ORIGINAL BORES. Make sure you drill and cut straight. Use all the guides available and it's not as scary as it sounds.