Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2977832. i remixed the nasa wrench to be be 2 sided and hollow at the handle. i had to change the handle shape to be able to print the hollow portion. so print with flat side of handle down. i added a 1/4 inch adapter that makes it 2 sided functioning. simply put the adapter in one side to ratchet one way, and the other side to ratchet the other way. the adapter is printed separately. i included