This is the smaller version of the Tormek Japanese Waterstone, which has the same composition and qualities as the SJ-250.
The Tormek Japanese Waterstone 4000 grit delivers a mirror finish with hardly any visible marks. Since the stone is made to create the finest surface, it has a limited steel removal capacity and cannot be used for shaping* a tool.
This waterstone excels at sharpening hand tools like carving tools, knives, scissors, plane irons and wood chisels where a minimum of steel removal is needed and a superior surface finish is demanded.
You should clean the stone surface of steel particles every minute or so with the fine side of the Stone Grader SP-650. Do not use the coarse side of the Stone Grader on the Japanese Waterstone.
Its unique composition gives the stone an extremely long life. Since the surface left by the Japanese Waterstone is so fine, we do not recommend honing afterwards on the leather honing wheel.
SJ-200 fits Tormek T-4 and previous Tormek models with a 200 mm stone diameter.