Hand spring dock leveler     

   1.Don't need electric, any time and everywhere can use it.

   2.A strong spring system, simply and easily.

   3.Lifting by a small tach, dropping by a man pedal dock leveler.

   4.A safe pole, a safe block beside the dock leveler, more safety for using.

   5.High frequency and longevity for using.

Common size, special size will made by your requirement