Tongs are Mailsmithing Forgotten Profession Assets that can be acquired as necessary components for completion of a number of rare tasks in that profession and/or as optional components that will improve the chances of receiving a higher tiered armor piece or weapon upon completion of a rare task.
[Worn Tongs] may be purchased for 1 from M'tari Prin'tal in Protector's Enclave (North corner of the Seven Suns Coster Market). Tongs of higher tiers may be acquired from [Professions Booster Pack] and asset packs purchased in the Zen store. Tongs are not bound and may be traded on the Tarmalune Auction House or transferred between players.
A task requiring tongs as an asset will take any tier of tongs in its slot. Higher tiered tongs serve only to improve the chances of producing a higher tiered result in rare tasks for which they are used.
At Profession Level 3, 4x [Iron Tongs] can be upgraded to produce [Steel Tongs].
At Profession Level 4, 4x [Steel Tongs] can be upgraded to produce [Mithral Tongs].
There is no task that will allow [Worn Tongs] to become [Iron Tongs].