Sub-trochanteric fractures accounts for approximately 10-30% of all Hip fractures. These fractures are difficult to manage and are frequently associated with complications, owing to high stresses in this region. Proximal Femoral Nail has immense potential advantages and suspected lower complication rates, hence long Proximal Femoral Nail in our system needed to be augmented and further studied . We evaluated the functional outcome of long proximal femoral nailing in management of sub-trochanteric fractures.