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I was looking at the reviews for these blades and was hoping for better performance than what I actually got out of them. I was only able to cut 3 drywall screws with one blade before it was dull. I know drywall screws are fairly hard, but I still expected more from these blades, given how highly they are reviewed.
I tried to cut a stainless steel (1/8" thick) finish screw with this and did not get anywhere. Switched to an older DeWalt blade, and that one cut the screw, no problem. I will try it for some other tasks, but for cutting nails and screws it is not great. So this blade does not appear to be a hardened steel . It has som type of Yellow coating on the edge, supposedly titanium. Possible, but surely does not do any good for nails .