Miniature Rock Climbing Cam

This is a working miniature rock climbing cam, the wing parts fold in and out when you pull down on the bottom bar. It is small enough to be used as a large keychain. To build it you just need some paper clips to work as hinges, a pen spring to make it open and glue to connect to the 2 outside pieces together. Print 2 of each wing type, the outside piece, and the brackets. When i printed it some of the hole the paper clips go into printed at slightly different sizes even though they are all the same, so depending on your printer you might have to force the paper clips through. Assembly can take a little while but its not too complicated. The middle rod goes in the center with the inner wings on either side facing opposite directions. then the outside wings can be put on. Then connect the brackets between the inner and outer wings. After that connect both brackets to horizontal bar with the part of the bar sticks out facing up. Put a the pen spring on the middle rod, then the final step is to put that into the outer pieces and glue those 2 pieces together.