One thing to note is that most knockoff multimeters, although they may advertise a cat III or cat IV rating, don't actually have a proper protection and shouldn't be used on electric mains. A $15-30 multimeter is almost certainly not properly protected against arc flash. And while Fluke may not have a huge presence in some corners of the world, in the US and Canada they're the biggest, most well-known player. There are other makers of good multimeters, but they're all fairly different from the Flukes in looks if not function.
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