Polar Block are the only file blocks that hold up and do what they're supposed to
Don't waste your money on any other brand of nail file blocks, POLAR BLOCKS are the only ones that hold up and do what they're supposed to do.  We couldn't find these for a while and bought a few other brands that were just awful, this brand is far superior to all others and the blocks allow you to get into tight corners of your nail as well.  Great for toe nails and finger nails.
Rating: 5 stars