With potential for injury, but otherwise good ....

Its function satisfies this Apple corer very good. The diameter is the same size that the core housing is completely cut out. He sits comfortably in the hand and can be cleaned easily. He is also so sharp that it can bite through the apple relatively easy. But just having the sharp spikes it all:
Since it is incredibly difficult to remove the core from the cutter, this is only possible with considerable force. However, this entails a not insignificant risk of injury if it slips off, which I unfortunately happened at the very beginning. As you think about it 2 times, whether you use it.