There are two sorts of cutting disk: thin ones which are very brittle but will
cut hardened things (like padlock hasps) very fast, and somewhat thicker ones
based on resin and abrasive impregnated course cloth. You can be quite rough
with these, but because the cut width is much wider, it takes longer. I always
used to think that advert showing someone cutting a nail with a dremel was
silly, but in fact I'm surprised how often I do use them for this sort of job.
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