Fully Automatic, Adjustable Door closer

So yea i made this door closer. It´s a Door closer... Made out of 100% pla... How cool isn´t that? :D I fitted two small nails in order to hold it in place. Superglue, double adhesive or screw it in place!

-Print out two holders! -

For it to work best the door needs to be smooth closing and not too heavy. You can adjust this by simply moving the Doorshutter-holders.
Have fun!

Rules to download this, post a pic of your print! :p And please comment if you have any improvement thoughts...