DMT Dia-Sharp Diamond Bench Stone Extra Extra Coarse 8 in. DM. has been designed to be the best available way to make sure your knife is is sharp and reliable This Knife Sharpening System from the expert product specialists at DMT is for those who prefer a continuous diamond surface especially for sharpening small or pointed tools. For a great way to make sure your knife is is the sharpest around choose the DMT Dia-Sharp Diamond Bench Stone Knife Sharpener 8 in.. Specifications for DMT Dia-Sharp Diamond Bench Stone 8 in.: Manufacturer: DMT Fabric/Material: Wood Package Contents: DMT Dia-Sharp Diamond Bench Stone 8 in. DMT DMD8XX: Dia-Sharp Diamond Bench Stone Extra Extra Coarse 8 in.