this was shared by Jacqueline Bedsaul Johnson from Best Friends Animal Society – Parrot Garden on Facebook
This photo was taken at Best Friends Parrot Garden and the design was shared with them from Lynn Siebert, who is a certified behaviorist. They have been using this design for over 12 years and welcome anyone to use it, and share it.
You can also visit there site here Best Friends Animal Society
Feathered Angels 
will this help them to stop plucking?
this can help some, gives them something else to mess with. They do have to be replaced often though.
Do both wings go through the one “heel” hole?
Yes 🙂