PIAO 12.8" (32.5cm) Diamond Coated Knife Sharpening Stainless Steel Sharpener Size: 32.5cm *20cm *1.0cm (12.8"*8"*0.4") . Rod length: 20cm (8") . Diameter: 1.0cm (0.4") Material: Stainless Steel, diamond coated Diamond-electroplated ensure efficient and sharp sharpening result Oval shape sharpening rod design ensure higher sharpening efficiency Humanized handle design for aesthetic and practical