Naniwa Essentials Pack A perfect set for those with zero up to intermediate level sharpening experience, it contains two full thickness stones that will sharpen many, many knives. Set contains one Naniwa 400 Advance stone-double thickness, one Naniwa 1000 Advance stone-double thickness and stone holder. Naniwa Advance Sharpening Stones This series of sharpening stones from Naniwa are made from the same high quality grit as the PRO series but made from a softer resin with slightly less grit for those on a budget. These stones are made from tightly packed resin bonded grit and have the following advantages: No pre soaking required - simply splash some water on the surface and start sharpening Faster cutting than regular stones Longer lasting - about twice as long as regular stones Much less mess than “cement” type stones The Naniwa Advance Stone series ranges from 400 to 12000 grit and are all made via the same resin bonded process to give a consistent “feel” through the sharpening process N.B. Please do not soak this stone for long periods as it will degrade the stone. Dimensions: 210mm (L) x 70mm (W) x 20mm (H) - stone dimension