Features: The quenching hard chain, prevent break, high hardness, durable wear-resistant, smooth cutting. Durable one molding guide plate, cold rolling technology, no welding, no fracture. Chain tightness adjustment, turn the screwdriver left and right to adjust chain tightness. Safety protection thickened baffle, safe protection at all times to prevent splashing of wood chips. Built-in oil can, automatic oil supply system, effective lubrication, no oil leakage, reduce chain wear. The maximum cutting distance is 28cm, easy to cut metal, wood, glass and other materials. Built-in large rate of work pure copper motor, quick rotate speed. Equipped with accessories and installation tools, one machine dual use, efficient and convenient.