As a result of using this product, I found that my old and worn-out blades became razor-sharp in no time! The industrial and scientific design of this tool made it easy to use and saved me time and money by not having to replace my tools. The only drawback was that the instructions could have been clearer, but once I figured it out it was smooth sailing. Overall, I highly recommend this product to anyone who wants to breathe life back into their blades. .