AM-K 220 grit is in great demand for the rough sharpening of knives and is included in all Boride stone bundles

Estimated grit for the stone is 6000-8000 JIS

Aluminum Oxide

Boride Narrow Sharpening Stones are used for sharpening knives on Edge Pro sharpeners

Edge Pro 400

suehiro rika 5000 edge pro AM-K 220 grit is inRika 5000 sharpening stones are used for sharpening knives on Hapstone and Edge Pro knife sharpeners. Rika stones are made of aluminum oxide. All Rika stones are 5 6 mm thick and are mounted on high quality aluminum blanks. Rika is part of Suehiro traditional Waterstone series which includes Kouga 3000, Rika 5000, Shiramine 6000, W8 8000 (Junpaku) and G8 8000 (Takeiro). These stones are not available in a wide range of grits. Traditional series does