Threaded Inserts, M3 M4 M5 M6 M8 M10 M12 302 Stainless Steel Self Tapping Thread Insert Screw Bushing Slotted Wire Thread Repair Insert-55 Pcs

Product was as described

I like the theory of this product but it was very difficult to make the threads work with the bolts it was scheduled to match. The delivery and assortment were good but it requires intermediat skills to

Pretty disappointing. First, the M4 sleeve is for an M6.5 hole!? 6.5?! Not 6? Who the hell has an M6.5 tap? Not me. Because the "self-tapping" is nonsense. Even with a 6mm hole, it won't cut its own threads, just blunted right up.

Was initially interested in receiving a free sample to test out in an application which is listed in the description- although I would have purchased an entire set if the seller had simply declined to send a few pieces for testing and a review...However, I received a reply that entirely contradicts the description- that this product is not suitable for use in 6061 aluminum... which is rather strange, considering that is perhaps the most common material used in all of the applications/industries stated in the product description.So, I won't be purchasing a set, despite the low price... nor will I be purchasing any identical product.I have the brand name coming from somewhere else, and they were actually cheaper for high (and known!) quality.According to the seller, these aren't good for much.