Review on 🔪 DMT A4X Diamond Whetstone Aligner: Precision Sharpening Tool for Knives and Blades by Jason Regalado

The leveling kit this stone works with is handy and most people should be able to sharpen a knife decently without much practice or know-how. This stone makes the edge good enough for regular kitchen work. You need a very thin stone to get an edge that is almost very sharp. The diamond stone is apparently expected to leave a slightly rough edge. It cuts so fast it leaves tiny gouges in the beveled edge. Update 11/05/10 I have noticed a potentially significant downside to using diamond stones to sharpen knives and tools. I'm no expert on this, and I haven't seen it mentioned anywhere else, so take it with a grain of salt. The blades of the knives I sharpen are sharp, but they don't stay sharp for very long. First, no matter how well you sharpen an edge, it's not perfect. On the edge are small microscopic teeth. Looks like a saw. These "teeth" on a knife are not the same size, shape, and spacing as they are on a saw. And at the same time they are not rigid like a saw. When you cut something on a knife, those weak teeth bend one way or the other, and the knife begins to dull. my theory difficult. They cut very quickly. They also cut very deep. They make deeper grooves on the beveled edge than any other type of sharpening stone. These deeper grooves make larger teeth on the edge of the knife. A larger tooth is naturally weaker and bends more easily. Without going into too much detail, deeper grooves result in each small tooth having less physical support, making it even weaker. You will bend even easier. No matter what you use to sharpen your blade, those little teeth will be created. You are always present. It seems to me that the diamond stone makes the teeth weaker and bends more easily. As a result, the blade will not remain sharp as long as other grinding materials are used. Additional note: because diamond stones are so quick and easy to sharpen, I still like them and will continue to use them. I can try to find another whetstone to use as a final sharpening step to give the knife a "finer" edge.