great tool- I've been using a battery type dremel, and over time the battery wears out. So far this grinder works great. Don't count on the drums lasting long, however- but the dremel replacements fit and I use the finer grit ones for a better finish.
Ever since a puppy I have gone through many clippers for a GREAT DANE'S Nails! My danes are trained enough not to bother with it so once I started with a dremel tool to trim and form the nails I will never use a clipper again!!!