The Trephine Ejection Kit incorporates several unique ideas that make it truly special. Internally cooled trephines enable the safe removal of bone cylinders. This internal cooling reliably prevents damage to the bone tissue due to overheating. The removable trephine working parts allow for particularly easy removal of the reamed bone cylinders. The bone can be easily pushed out using the ejection instruments , which are specially designed for the trephine diameter . The set also includes pre-punched trephines, which ensure safe trephine application. The Trephine Ejection Kit enables the user to work quickly and safely and offers a high degree of flexibility thanks to various instrument sizes.