The Revlon Shape n Buff file and buffer is a must have nail accessory. It comes with two filing surfaces as well as 4 buffing surfaces. This is the only filer that I currently use, it leaves your nails feeling extremely smooth and looking like they were professionally manicured. Thanks to this tool, I can skip the nail polish altogether but still have nice shinny looking nails. It can be used both for buffing and filing, and will last me a good 6 months before it needs replacement. Excellent product for an affordable price.