We’ve used water stones in our shop for years and find them to produce a sharper edge in less time than any other sharpening system. Because water stones are softer than other stones, the surface is worn away and fresh abrasive is continually exposed. The result is a consistently fast cutting surface. Keep these generously sized, professional quality stones soaking in water and re-flatten occasionally on a flat abrasive surface. 8 1/4″ length (the small 6000 stone is 7 1/4″).