The 3D printer manufacturer had 159 of its machines working simultaneously at its California offices on Dec. 13, 2014, getting the company into the Guinness Book of World Records. The printers made over 200 prosthetic hands as part of a charity event.

“It was an amazing 24 hours of adrenaline and we were determined to make it happen, and so excited that we did it,” said Airwolf CEO Eva Wolf in a statement. “The best part is that we put our 3D printer farm to work for a good cause.”

The 3D printing industry is expected to grow to $16.2 billion by 2018, according to data from the research firm Canalys. The sector reportedly earned $2.5 billion around the world in 2013, increasing $3.8 billion last year.

Canalys said in December that 3D printer shipments rose 16% in the third quarter of 2014. In the U.S., 3D printer revenue grew 16%, making up 44% of the worldwide total.