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Tough Binding Cast is an item added by Tinkers' Construct.
In order to craft a Tough Binding Cast, 288mB of Molten Gold or Molten Aluminum Brass is needed in a Smeltery. Tough Bindings crafted from a Part Builder. Place the Tough Tool Binding on the Casting Table then pour the 288mB of Molten Gold or Molten Aluminum Brass in order to form a Tough Binding Cast around the Tough Tool Binding.