I received this product the day after I placed my order and started work. I drilled holes in thick 10-12 steel studs. After 14 holes the bit feels as sharp as I got it. I usually drill about halfway through (at a slower speed), then apply lube to the cut and finish the hole. The first pilot bit broke on the second hole, but I think it's because I didn't tighten it properly. I simply replaced it with one of the similarly sized bits, tightened, and continued drilling. This product definitely met my expectations.
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