The 50/80 Grit Diamond Stones Pack is perfect for anyone who spends a lot of their time re-profiling blades that have seen serious damage. 
 
These stones are highly aggressive and remove metal quickly, so take care when using them. These stones are not needed or suggested for the majority of users.
 
Each handle has one side of 50 grit (black) and the other of 80 grit (grey). 
 
Imported directly from Wicked Edge Precision Knife Sharpeners, USA