The Trend diamond sharpening stones are some of the best, long-lasting stones in the industry. This credit card sized diamond stone has one side with 300 grit abrasive and the other with 600 grit. This will allow you to both resharpen a damaged or dull blade as well as to refine the cutting edge on knives, gouges, and any other blade. With very little pressure, this stone sharpens your blades quickly, especially when used with the Trend Lapping Fluid (sold separately). This would be a handy little stone to add to tool bag to help you keep your tools razor sharp!