The result was rusty, corroded and the bit actually cracked. This is a 3 piece set and the largest drill bit is rusted and cracked when received. I'm not sure how this is even possible, but unfortunately it is. Even the largest drill has cracked (i.e. the metal cutting edge has broken off) and has some sort of pink corrosion. This leads me to think that these bits are NOT meant to last forever as they didn't even survive being opened by the customer. I can't imagine what would happen if the drill bit cracked like that while drilling. Metal splinters flying everywhere? I cannot recommend this product. I would be willing to update this review if the manufacturer contacts me and explains what could have gone wrong and exchanged this obviously faulty product for something more than worth nothing. Very surprised at the lack of quality here. DO NOT BUY THIS.
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