Hey there! this is a very simple and easy to print model but there are some things to take into consideration. This model was created just for its purpose but in order not to forgeting it i made a hole in it so you can use it as a key chain. Here comes the important thing: if you want to use it as a key chain it will be unconfortable by the time you want to open the door with the keys hanging in the same hand that you have the heavy bags so i recomend using it with a clip that you can take of fast and easy. Just like this: 

If you have any questions feel free to ask! I will be glad to answer :) 

Happy printing!