The argonite gauntlets (Tier 7) are an item, worn in the hand slot, that can only be obtained and used while Dungeoneering. They require level 60 Defence to wear. They may be picked up from the table at the beginning of a dungeon, obtained as a monster drop, or produced using the Smithing skill.
They can be produced by using 1 argonite bar with a hammer on an anvil, requiring level 61 Smithing and granting 64.5 Smithing experience.