Ruko 325/600 Grit Double-Sided Diamond Bench stone Knife Sharpener (6-Inch x 2-Inch) Diamond Grit Double-Sided Sharpening Bench stone, 6-Inch x 2-Inch Double-Sided Stone with 325 Grit (Medium) and 600 Grit (Fine) allows for quick and easy re-sharpening of all your Knives and Tools Integrated ABS Base and Hand Guard with Table Top Pads allows for secure sharpening Weight: 11.94 oz Lifetime Warranty