UPDATE: IF YOU WOULD LIKE TO PURCHASE THESE, CHECK OUT MY ETSY SHOP. THEY COME WITH PRE-ASSEMBLED WITH PINS. YOU CAN BUY THEM HERE: https://www.etsy.com/shop/theGUNNfactory
This is a Batarang Push Pin that you can hang stuff on the wall with. Just insert a metal pin into the hole with a little super glue and stick it in the wall at a 20 degree angle to achieve that rakish angle you always see in the movies.
Great for delivering company-wide memos!
I printed this on a Makerbot Replicator 2X with black ABS. The model has pads to help the build adhere to the platform, but I always make sure I "paint" the build plate with a slurry of ABS dissolved in Acetone. This coats the Kapton tape with a thin layer of ABS and greatly improves adhesion. Once the print is complete, cut the pads off of the model with a hobby knife. Cut a piece of metal wire (about .050" diameter or 1.25mm diameter) about 3/4" long and put it in the hole in the side of the Batarang with some pliers. Use some CA glue if you are worried about it holding up over time.
Here are my print settings:
MakerBot Replicator 2X, black ABS, ~30 minute build time: