These models are highly detailed and tested in a resource pack. There are two types of katanas in this pack, Ice Katana/Water Katana (whatever you want it to represent) and same with the other.
You will get a folder and inside of that there are 3 folders. More info on that is in the README.txt file.
You will get a folder and inside of that there are 3 folders. More info on that is in the README.txt file.