Imanishi 10000 honing stone Bester series 10000 grit grade whetstone for. honing; obtaining a mirror finish; following an Imanishi 4000 honing session; Size 205 mm x 76 mm x 25 mm The stone is harder than, say, the Naniwa Sharpening Stones 8000 and 10000, but softer than, say, the Naniwa Professional Stones and provides a better feedback. The relatively fast buildup of fine abrasives on the ...