Review (5/5): Strong little device.  I think this might be good for diabetics too.
It is a great little grinder. And runs by USB power so its very low wattage.
My mother is diabetic and has to be very careful about the shape of her toenails. Its very important to avoid infection. Regular clippers are hard to position correctly sometimes. And there is a risk of 'over cutting' the nail and causing issues that way.
With these you are shaping the nail slowly so you can control it a whole lot better. Less chances of clipper accidents.
**I'm not a doctor nor do I play one on TV. Its just my opinion that these are a good choice for diabetics.
I was given these as a vine promotion for the review. But that aside I like it and see it as a durable useful tool. Mostly because I end up being the one that has to take care of the toenail business And these make it easier to take care of.