Key Features Delivers an extra fine surface finish Excels at sharpening hand tools where a minimum of steel removal is needed 4,000g ideal for carving tools, scissors, knives, plane irons and bench tools In Detail The Tormek SJ-250 Japanese Waterstone delivers an extra fine finish. It excels at sharpening hand tools where a minimum of steel removal is needed and a superior surface finish is demanded. The stone is 4000 grit and is ideal for carving tools, scissors, knives and well maintained plane irons and bench tools.