A wire stretcher which allows retainers to advance slightly over a k-wire in order for them to apply compression on the fractured bone by stretching the k-wire prior to placing the retainers used for fastening and treating the fractured bones at the desired area on the bone surface, wherein a squeezing apparatus having a bearing in the area out of which the k-wire gets within the holding part of said squeezing apparatus, said wire stretcher comprising - an outer body, a mid body configured inside said outer body, and an inner body configured inside said mid body, which are concentric; - a formed tip which is connectable with the wire retainer, is suitable to be seated in the bearing disposed in the holding part of the squeezing apparatus through which the k-wire passes, and is located at the end of the outer body; - a k-wire channel which is at the center of the inner body, and thus at the center of the mid body and the outer body as well, and which allows the wire stretcher to advance over the k-wire until the formed tip and the bearing disposed in the squeezing apparatus fully contact with one another; - a holding part connected with the inner body in a way to allow manual guidance of the k-wire and manual holding of the wire stretcher; - moveable threads disposed at the end of the inner body opposite to the end connected to the holding part, which allow the k-wire to pass therethrough by being widened and which compress the k-wire by getting close to one another after the k-wire passes through the k-wire channel; and - wherein upon rotating the outer body when the k-wire is compressed by the moveable threads, the mid body and the inner body together retract towards the holding part of the wire stretcher inside the outer body, so that the k-wire is stretched and the wire retainer at the tip of the squeezing apparatus advances slightly on the k-wire and applies compression on the fractured bone. - an outer body, a mid body configured inside said outer body, and an inner body configured inside said mid body, which are concentric; - a formed tip which is connectable with the wire retainer, is suitable to be seated in the bearing disposed in the holding part of the squeezing apparatus through which the k-wire passes, and is located at the end of the outer body; - a k-wire channel which is at the center of the inner body, and thus at the center of the mid body and the outer body as well, and which allows the wire stretcher to advance over the k-wire until the formed tip and the bearing disposed in the squeezing apparatus fully contact with one another; - a holding part connected with the inner body in a way to allow manual guidance of the k-wire and manual holding of the wire stretcher; - moveable threads disposed at the end of the inner body opposite to the end connected to the holding part, which allow the k-wire to pass therethrough by being widened and which compress the k-wire by getting close to one another after the k-wire passes through the k-wire channel; and - wherein upon rotating the outer body when the k-wire is compressed by the moveable threads, the mid body and the inner body together retract towards the holding part of the wire stretcher inside the outer body, so that the k-wire is stretched and the wire retainer at the tip of the squeezing apparatus advances slightly on the k-wire and applies compression on the fractured bone.