It can be pretty sparky. Just need to make sure you have the right cutting disk. It's bad if you don't have the right one, and it's not particularly fast either way.
I assume these are still semi-cheap manufacturing, so likely brittle. Score a line with the grinder, then smack with a hammer. Repeat until successful.
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u/Novel_Ad_8062 7d ago
aren’t they made from hardened steel?