They have a good build quality, they will cope with their task. In truth, one is used on a BBQ grill and the other is a spare that will eventually be used for something that requires steel bristles. I have other wire brushes with thicker steel bristles so I don't think it's heavy duty. These aren't that brutal. If you're not careful, they'll peel the joint in no time, but you'll end up with thinner gouges than brushes with thicker wires.
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