About this 3D model

Small chain, printed monobloc. https://www.youtube.com/watch?v=1BPbirBpWsg&feature=youtu.be I am limited in length by my printer. I put a file with a longer string length. Two removable links are used to connect and close the chain. Deburring is very long. Be very careful when trying to rotate the links. The chain is strong enough when the burrs are removed. The rollers are part of the axes. Too complicated to turn them. It is possible to make a long length by adding links. It can also be used to make a small bracelet. A + NOP21