Metallurgy-1.6.4-3.3.2.jar is a release file of the Minecraft mod Metallurgy, made for Minecraft 1.6.4. It was published on January 16, 2014 and is 1 MB in size. For the full description, screenshots and every other version, visit the Metallurgy mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.