The .x_b file extension represents a binary file format used by the Parasolid geometric modeling kernel. Parasolid is a widely used solid modeling kernel developed by Siemens PLM Software. Files with the .x_b extension store 3D solid models and related geometric data in a compact, binary format. This format is designed for efficient storage and fast loading of complex 3D models. The binary nature of the file makes it less human-readable compared to its ASCII counterpart (.x_t), but significantly reduces file size and improves performance when dealing with large and intricate designs. These files typically contain information about the geometry, topology, and attributes of the 3D model, including surfaces, curves, solids, and their relationships. They are commonly used in CAD/CAM/CAE applications for exchanging 3D model data between different software systems that support the Parasolid kernel. The .x_b format ensures data integrity and precision during the exchange process, making it a reliable choice for engineering and manufacturing workflows.