The PSC fixed toolholder is the "cornerstone" of the Capto modular tool system on the machine tool side. It connects the machine tool spindle with various Capto toolholders by providing a high-precision, high-rigidity, standardized interface, thus providing a strong basic support for modern efficient, precise, and flexible CNC machining. It is an indispensable key component in applications that require extreme performance, high repeatability, and high efficiency.