In the cross rail, precision rollers are combined with roller retainers that are orthogonal to each other and used in combination with 90 ° V-shaped groove rolling surfaces set on dedicated tracks. By assembling two parallel columns of roller guides, the guide system can withstand loads in four directions. Moreover, due to the ability to apply pressure to the cross roller guide rail, a seamless, high rigidity, and agile sliding mechanism can be obtained. Cross roller guide rails are widely used in office equipment and its external devices, various measuring instruments, precision machines such as printing substrate drilling machines, or sliding parts of optical measuring equipment, optical workbenches, control mechanisms, X-ray devices, etc.