It appears to be able to cut through standard black oxidized steel bolts but it's clearly cast and any shiny metal on the surface isn't high speed steel - it should be chrome plated or something. That makes me doubt the long-term hardness and durability. That's less of an issue than the fact that it simply won't cut anything smaller than 8mm in diameter, which I wish I'd known up front. This makes it unusable for me.
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