Astronauts on the International Space Station were in need of a new wrench. However, thanks to 3D printing, they didn’t have to wait for a shipment to arrive in space. Instead, they were able to open a simple email attachment and print a new wrench. Once the digital file arrived on the space station, astronaut Wilmore fired up the printer, which churned out 20 separate parts which Wilmore assembled into the exact wrench he’d requested, ‘Tech Times’ reported. Previously, if astronauts requested a specific item they could have waited months for it to be flown up on one of the regular supply flights.