Restaurant paper dispenser key opener

I designed this key for a friend of mine who needed a key ASAP so I create it and print for him and I share it here for everyone who needs it as well.
UPDATE: Please use MK2 version which has been fixed from errors.
UPDATE #2 I edited again the "combination" part of the key, and analyzed it using Netfabb. Jairo key14July2015 is the latest file.
please tell me how it worked out.
Thanks