RH gearless hand operated pulling and lifting machines are used for rectilinear pulling of steel wire ropes by the gripping and releasing actions of two  sets of jaws alternately. Each set consists of a pair of smooth jaws of suitable length which grip the wire rope firmly by closing top and bottom without causing damage to the rope. These jaws work on the self clamping principle, that is they are locked by the pulling force of the wire rope itself. The jaws are enclosed in a casing  and are connected by rods to forward ( or up ) and reverse ( or down) mechanism which is operated by a  telescopic handle.