1、You do not need to remove the ch-ain from the machine, just grinding it easily and conveniently. 2、It is in small size and light enough for you to carry it with you to any where you want to use it, you can hold it in one hand and use it, which also can saving your energy. 3、Using the powerful and large power motor, which is made of pure copper, has the characteristics of stable performance, not easy to heat and more durable. 4、You can use the different accessory for the different needs, you do not need to buy the accessory one by one, which can save your time and money. 5、With the lithium battery, you do not need to worry about the battery suddenly running out, which has a long serivce time. This chain-grinding machine is useful for you to use in your daily work, you can use it for grinding the ch-ain of your electric chainsaws or other chains of tools, which is convenient and can saving your money, come on and try it, it will not let you down. Features: You do not need to remove the ch-ain from the machine, just grinding it easily and conveniently. It is in small size and light enough for you to carry it with you to any where you want to use it, you can hold it in one hand and use it, which also can saving your energy. Using the powerful and large power motor, which is made of pure copper, has the characteristics of stable performance, not easy to heat and more durable. You can use the different accessory for the different needs, you do not need to buy the accessory one by one, which can save your time and money. With the lithium battery, you do not need to worry about the battery suddenly running out, which has a long serivce time. Specifications: Material: plastics Adapter: EU, USA (optional) Battery: 2 * lithium battery, 2000mAh (included) Power: 55W Speed: 20000r/min Clamping ran-ge: 3mm Item size: 273 * 50mm / 10.7 * 2.0in Package size: 250 * 148 * 85mm / 9.8 * 5.8 * 3.3in Package weight: 922g / 2.0lb Packing list: 1 * Mini Grinder 2 * Battery 1 * Adapter (EU, USA optional) 1 * Accessory Set 1 * Mini Grinder 2 * Battery 1 * Adapter (EU, USA optional) 1 * Accessory Set