Support BladeForums! Paid memberships don't see ads! These are the Gritomatic CBN metallic bonded waterstones made for the edgepro and hapstone system. I Just custom made a stone holder for the edge pro stones so I can use them to there full extent since I don't use systems. I've been using these extensively for the past two weeks Different steels, different friends to try them, different methods of dressing and using them. Now I have alot to share. I got the 1000 grit and the 400 grit. This will be a on going detailed review with pictures, text and video.