The 800/1000 Grit Diamond Stones are an excellent all-around finishing stone. They maintain the micro-serrations needed for a working edge but leave a refined enough finish to cleanly slice through any delicate material. These are also necessary steps for taking your edge up to a polished finish.
 
Each handle has one side of 800 grit (blue Extra Fine) and the other of 1000 grit (purple Ultra Fine). 
 
Imported directly from Wicked Edge Precision Knife Sharpeners, USA