YJZ 1Pcs Diamond Sharpening Stone,400 Coarse Grit/1000 Fine Grit Double-Side Diamond Sharpener Whetstone for Various Kitchen/Garden Tools Knives Scissors
£28.99Reliable Material:Knife Sharpener Stone made of reliable abrasive material diamond,because of high hardness but low loss,durablity and you can use it for the long time.