This is based on the original NASA wrench but has been improved with tighter internal tolerances and has a dual side to tighten and loosen. It is also split into separate pieces with the shell modified and with the addition of screws so that you can assemble it and disassemble it to change parts unlike the original that was a print in place.
the shell was printed in PLA + with 50% Gyroid infill - screws and internals were printed with a 75% infill.