.. Oh ne is not the hardware store here .... Must me there first purely keys - but the 2nd grind my claws I am quite satisfied. The change left / right was super - I would bask disengaged. Setting the speed to rescued me. So my conclusion with "the" device - inexpensive - makes the moment more than I need and seems to run really stable.
Some complain that it allows you to not remove calluses on your feet! So I've only read what of Nails - Fingernails of UDN is working as "the" Device really good!