I bought them for jewelry making. Brass brush wheels in their class gave a pretty premium finish. Other reviews say they are tougher. This could explain why the finish is matte. My biggest concern was the oil spreading over the tips of the bristles when using the wheels. I can only assume that there is oil residue from production in the hub. But it left my work oily and messy. I'll spend the money and get the Dremel version next time.
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