Behold, Aule now gathered six methals, copper, silver, tin, lead, iron, and gold, and taking a portion of each made with his magic a seventh which he named threfore tilkal, and this had all the properties of the six and many of its owns. Its colour was bright green or red in varying lights and it could not be broken, and Aule alone could forge it. Thereafter he forged a mighty chain, maiking it of all seven metalls welded with spells to a substance of uttermost hardness and brightness and smoothness, but of tilkal he had not sufficient to add more than a little to each link . Nonetheless he made two manacles of tilkal only and four fetters likewise. Now the chain was named Angaino, the oppressor, and the manacles Vorotemnar that bid for ever, but the fetters Ilterendi for they might not filed or cleft.

"The Chaining of Melko", The Book of Lost Tales 1

.. .. Tulkas (.. ..) the strongest of the gods/Ainur
.. .. Melko (r) rightly attempted to have Tulkas restrained, he demanded that they bind Tulkas with the chain Angainor, which had been made to hold Melko.

И по -русски: Тулкас- Вала.