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Drill Bits For Metal

Drill bits made with a titanium nitride coating resists corrosion and friction. It beats black oxide in that it increases surface hardness and does a better job reducing heat while drilling through metal. For metal drilling, we definitely put these as the bare minimum.With titanium nitride, you have to remember it only coats the bit. As the coating wears off the cutting edges, you pretty much have to replace them. Don’t use these bits for drilling hardened steel or stainless—not if you want them to last. Over the years, we’ve used and/or tested dozens upon dozens of drill bits for nearly all applications. In this go-around, we wanted to identify the best drill bits for metal applications. That includes hardened...

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