The ODALYS system is a compact, effective and highly functional instrumentation that makes posterior thoracolumbar athrodesis possible. This device has a double-threaded screw for easy penetration and durable anchoring of the screw in the pedicle. It includes a low profile screw with limited height to ensure patient's comfort. It has a 40° polyaxial system which allows motion for the screw head in all spatial planes which facilitates the installation of the rod. It has a full line with sterile or non-sterile implants and also consists of monoaxial screws, polyaxial screws, sponsylolisthesis screws, cross-link, pre-bent rods as well as straight rods.