DMT Dia-Sharp Coarse Grit DMT. This Knife Sharpener from the great folks at DMT measures 10" x 4" x 3/8" with coarse grit is clearly marked on side of stone. Don't hunt without the DMT Dia-Sharp Coarse Grit Knife Sharpener. Specifications for DMT Dia-Sharp Coarse Grit: Manufacturer: DMT Grit: Coarse Color: Gray Length: 10 in Width: 4 in Height: 0.375 in Features of DMT Dia-Sharp Coarse Grit Knife Sharpener: Measures 10" x 4" x 3/8" Coarse grit is clearly marked on side of stone Includes non skid rubber feet Hang packaged Package Contents: DMT Dia-Sharp Coarse Grit DMT DMTD10C: Dia-Sharp Coarse Grit