This idea was later extended to use in radius, ulna, fibula, metacarpal fracture, especially in World War II. The hand drill was replaced by a power drill, which gave more precision and solved many issues. Parameters to ConsiderThe tip design and thickness of K-wire has impact in clinical utility. 2 K-wires of diameter less than 1.1 mm generate more heat than thicker wires. The most commonly used K-wires have either a diamond-shaped (flat) or pyramid-shaped (trocar) tip. Of the two, trocar tip will require a higher insertion force and in turn, generates more heat but may result in a better initial fixation. The tip can be either threaded or non-threaded. K-wires with threaded tip are especially useful in the shoulder, foot and ankle surgeries with the advantage of reduced chances of pin migration or loosening and having a better hold in osteoporotic bone. introduCtionA K-wire is a straight stainless-steel wire of varying thickness from 0.75 to 4 mm in diameter with either a diamond or trocar tip. The tip of the K-wire can be a smooth pin or threaded type and used for different purposes. The advent of insertional devices, antibiotics and corrosion-resistant metals were the important historical events that played a major role in the evolution of K-wire current design, usage, and indications.