WASEDA-SAT-ZERO was a 1U-sized
CubeSat that was built from a chassis produced by a metal 3D printer, without any screws inside. By eliminating screws, the weight of the satellite can be reduced, and the risk of attached parts coming loose through vibrations can be avoided. Furthermore, by 3D printing a satellite, there will be less time needed to assemble it, and may shorten the satellite's development time. According to Waseda University, this was the first CubeSat in the world to use a chassis manufactured by a metal 3D printer. Although WASEDA-SAT-ZERO was the fourth satellite built by Waseda University, it was named 'ZERO' to symbolize the fact that it does not have any screws in its main structure. ==Mission==