The thorn: It's actually about a musical instrument again, but there's a sting in it! that's what the 53 cm long or small button of a cello is called. and this spike has more to do with a spike than I knew prior to my research. the cello spike should not only hold the instrument out towards the musician, it should also hold the strings firmly under control. In addition, and this is probably the most important thing for the musician, it has the task of transferring the sound to the concert floor. It is really like a spike, it injects the sound onto the floor and thus increases the resonance space of the cello!!! there are famous patent protected cello endpins like e.g. the cello stachel from Berlin, but also every chinese instrument maker builds such a stachel.So here the model is an E cello with a spike, with an E cello it is only for holding the strings and the instrument.