Best Drill Bits for Metal for 2021 | Pro Tool Reviews
2021-7-12 · Best M42 Drill Bits—STROTON Metal Drill Bits For a Cobalt coating with a higher concentration, look to these STROTON drill bits, which fall under the category of M42 bits and have an 8% coating. This set comes with 19 straight shank pieces that give you the ability to drill holes through a wide range of metal objects.
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