Kotobuki Suehiro Japanese Sharpening Stone, Dual-sided #1000 and #3000 Grit, Large, Natural Double-sided water stone for sharpening knives, scissors, and other cutting tools Standard 1000 grit side for sharpening; fine 3000 grit side for finishing Lengthier size makes it ideal for sharpening longer tools such as large chef's knives or sashimi knives Water stones are the preferred method for sharpening as they provides absolute control Made in Japan