Features: Made of high-quality materials, durable, wear-resistant. The 12V electric chain saw grinder is convenient for hand grinding and makes manual sharpening easier. The main shaft is locked and the grinding stone can be easily replaced with long service life. Configuration of 12V plug with battery clips adapter, using standard 12V automatic battery operation. With three sizes of grinding stone: 4mm, 4.8mm, 5.5mm, basically meet your different needs. Specification: Condition: 100% Brand New Material: Plastic Connection Voltage: AC 220V Voltage: DC 12V Power: 55W Grinding Stones Sizes: Approx. 4mm / 0.16in, Approx. 4.8mm / 0.19in, Approx. 5.5mm / 0.22in Weight: Approx. 40.2g / 1.4oz Size: Approx. 20x7.5cm / 7.9x3.0in Package List: 1 x Chainsaw Sharpener 3 x Grinding Stones 1 x Instruction Manual 1 x Wrench 1 x Gadget 4 x Accessories Note: 1.Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard..