Dremel Rotary Tool for Sanding Dogs' Nails?

I want to purchase a Dremel for my dogs' nails - I'm looking at the cordless 7.2 volt. Can anyone tell me about their experiences with using a Dremel for their dog's nails and also the best type of sanding bands to purchase (my dogs are 55 and 60 lbs. - the Pointer has pretty tough nails)? Thanks!
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