●It is suitable for the work environment without power. ●Safety and simply maintenance. ●Compact structure and small package size. ●It's so high transmission efficiency that do need less output. ●It can be drived in a small turning diameter. ●The hinge linkes the left and right side plate to guarantee equal force. ●Regularly fill the grease on the bearings and rail surfaces. Meantime check whether there is any loose on the firmware. ●If there are any anomalous situations, stop using the product immediately and Check the cause to remove it . ●Regularly maintenance is needed.