DMT Diamond Whetstone 8 in Extra Fine Grit w/ Wood Storage Box Green. This Knife Sharpener from the experts at DMT measures 8" x 2 5/8". Don't venture outdoors without the DMT Extra Fine Grit Diamond Whetstone Knife Sharpener. Specifications for DMT Extra Fine Grit Diamond Whetstone: Manufacturer: DMT Color: Green Length: 8 in Included Accessories: Wood Storage Box Quantity: 1 Model: Extra Fine Grit Blade Material: Stone Features of DMT Extra Fine Grit Diamond Whetstone: Extra fine grit; Green 1200 diamond mesh; Measures 8" x 2 5/8" Package Contents: DMT Extra Fine Grit Diamond Whetstone DMT W8E: Diamond Whetstone 8 in Extra Fine Grit w/ Wood Storage Box Green