The conical inserts are mounted on extensions with cone receiver or the seperately available cone receiver. They can be adjusted in their angle so that your stylus system matches your requirements.
The rotary pieces with cone adapter can be mounted on extensions with cone receiver, for example to build up special stylus systems if no suitable star element or angle piece is available.
Ster elements M5
These star elements have M5 core threads for the connection of styli or extensions. They can be attached to extensions with cone receiver. Thereby, adjustable stylus systems can be easily created.