Product details:

The Naniwa Professional Stones have a dimension of 210 x 70 x 20mm. This roughly translates to 8 1/4 long x 2 3/4 wide x 3/4 thick. This size is just about perfect for most knives and tools. The thickness of the single sided stone will last countless sharpening sessions. A good three grit set is the 400, 1000 and 5,000. The 10,000 grit is costly to produce and is therefore more expensive. If your budget allows, the 10,000 grit Chosera is a really great polishing stone for any edge. This high-end stone will quickly become a prized possession in the hands of an experienced sharpener. You'll truly appreciate the consistent feel and fast-cutting that all Professional stones offer. What makes the Professional different from other waterstones is the bonding. They call it Magnesia Bonding in comparison to their Resin bonding on the Naniwa Superstone series. One of the main features of this process is greater density and consistency of finely graded abrasive particles. This gives the stone the fastest sharpening capability among our waterstones. Experienced users can really feel a difference with these stones.