The TSAG Series by Beijing Zolix Instruments is a motorized goniometer stage which is designed for high-precision angular alignment. For this specific model, it comes with an optic tilt adjustment and can adopt a stepper motor. With this functionality, it ensures a tilt angle adjustment that can be automatically hand-wheeled or motorized. It comes with two designs that are in pair which can work alone together. Each has different kinds of radius elaborate design that has the same points and two dimensional crossed rotation.