The V-Nail is a type of intramedullary fixation device characterized by its V-shaped cross-sectional design, intended primarily for the treatment of long bone fractures, especially the femoral shaft. It is a variant of the classical Küntscher Nail (K-Nail) and offers improved mechanical stability and anti-rotational properties due to its geometric  profile.

Manufactured from stainless steel or titanium, the V-Nail is typically a solid, non-cannulated implant, inserted into the medullary canal of the bone through an antegrade approach. While traditional V-Nails do not feature locking options, some modern versions may include proximal and distal holes to accommodate interlocking screws, enhancing fixation in unstable fractures or osteoporotic bone.

Its V-shaped structure allows better press-fit engagement with the endosteal surface, thereby increasing the rotational and axial stability of the fracture construct. The V-Nail is valued for its simplicity, durability, and affordability, especially in settings where cost or access to advanced implants is a concern.