It is usually inserted in the tailstock, but it can also be inserted into the spindle of the headstock, as a safety drive centre.

The latter option guarantees you safety when working, because when a catch happens, the woodpiece skids and stops rotating. It is suggested for beginners as well as for more delicate work. 8 mm diameter safety point can replace the tip of the other available inserts and is very useful for workings of small workpieces because it creates a span between tailstock and workpiece.

The Ø 8 mm head fits in place of the tip of the other heads and creates a space between the tailstock and the wood to be able to turn small diameter pieces.
The D. 24, 35 and 50 mm heads have a M16x1 threaded connection and are specific spare parts for Gamma Zinken  drive center

The central tip can be removed. You can interchange two tips, a shorter one that penetrates little into the wood and a long one that penetrates more compresses and compacts the wood fibers more, or by mounting the head Ø 8 mm