DMT Diamond Bench Stone Fine 11 in. DM. This Knife Sharpener from DMT is for those who prefer a continuous diamond surface especially for sharpening small or pointed tools. For an amazing way to make sure your knife is will outperform the rest choose the DMT Diamond Bench Stone Knife Sharpener 11in. Package Contents: DMT Diamond Bench Stone 11in DMT DMD11F: Diamond Bench Stone Fine 11 in.