The X2K Adjustable Hinge orthosis is the basic model in Breg's knee orthosis range. The "diamond shape frame" makes the construction very stable laterally and has good torsional rigidity. The orthosis is used for ligament damage and chronic instability in the knee joint. The model is based on good condylar contact to create stability around the knee joint together with the frame's long lever arms. The anti-slip system below and above the knee ensures that the orthosis stays in place and does not slide down. The condylar pads are individually adjusted for a perfect fit and installation surface. The joint is adjustable in extension and flexion.