Have used several sizes of metric Recoil inserts now, all have been high quality and very easy to use. These are the smallest I have tried and must admit I was a bit doubtful whether such a small thread would work OK, but I had no problems using these to repair a damaged M3 thread in aluminium. Obviously you need to use the correct drill and tap before fitting the insert, so best to buy the full repair kit, then get extra inserts to top up; pay attention to the length of insert required, which is specified in multiples of the thread diameter (e.g. 1.5D, 2D, etc). Overall very happy with these inserts and would recommend as a great buy at a fair price!
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