Key Points! * The Ryuhomaru's diamond vibrates at ultra-high speed, making it much easier to sharpen than before, even for those with less strength. * Ultra-thin blade design allows sharpening of blades in narrow spaces, such as those on peelers. * Uses one alkaline AA battery (sold separately). Product Specifications Product Size: (approx.) Length 195mm x φ25mm Weight: (approx.) 50g (excluding battery) Materials: Body/ABS resin Blade/Carbon tool steel, industrial diamond Motor/5000min-1 Continuous Use Time: Up to 5 minutes Heat Resistance: 90°C