DMT Dia-Sharp Diamond Bench Stone Sharpener Coarse 6 in. DM. is the best way to give yourself the edge. 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 6 in.. Package Contents: DMT Dia-Sharp Diamond Bench Stone 6 in. DMT DMD6C: Dia-Sharp Diamond Bench Stone Sharpener Coarse 6 in.