These coarse diamond hones work with the V-Sharp Extreme Edge Diamond Sharpener from Warthog Sharpeners. They have a 325 diamond grit that is ideal for sharpening kitchen, pocket, and hunting knives. It leaves a toothy, micro-fine serration that is perfect for cutting through vegetables or meats. Item comes with two diamond honers that feature an easy slide on design. Keep your edges razor sharp with the precision sharpening tools from Warthog.