The VLIFT system utilizes a distractible in-situ (DIS) implant which enables the surgeon to adjust the height of the cage to suit the anatomy of the patient. The pre-assembled VLIFT cage adjusts easily with a low profile inside thread design. The cage also includes a pre-assembled locking screw which can be engaged after distraction to lock the mechanism in place. Cage extensions snap into place on each end to build a longer implant construct. For example, an 18mm cage in width that is 60mm in length can be extended to 75mm in length with an extension at one end and up to 90mm in length when using two extensions. Modular end-caps snap into each end for quick assembly. The exterior side of the end-caps feature evenly spaced metal spikes, providing fixation to the bony endplates of adjacent vertebral bodies. The use of bone graft with VLIFT is optional. VLIFT is a vertebral body replacement system intended to replace a vertebral body or an entire vertebra in the thoracolumbar spine (T1-L5). For both corpectomy and vertebrectomy precoedures, the VLIFT system is intended to be used with supplemental internal fixation systems (Xia, Spiral Radius 90D, or Trio+).