The neutron stars are remanats of the supernova explosions. During that explosion, the star is pressed to a very dense form. And actually, all particles of the neutron star are turned into neutrons. The thing that keeps this neutron structure together is the combination of the weak nuclear interaction and electromagnetic interaction between the poles of the neutron. That structure is very strong. And maybe sometimes in the future, we can create the "neutron fullerene" the layer of pure neutrons that can use as the cover for layers. Neutron fullerene would be one of the strongest materials in the universe. The neutron structure is extremely strong. And that allows a very fast spin of the neutron stars. They are spinning extremely fast. And they are known because their powerful magnetic fields act as a particle accelerators. That thing makes them send fast particles across the universe. And those neutron stars are known as "pulsars". The truth is that pulsar require