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The Steeleaf is a component added by Twilight Forest. It is found in loot chests in Labyrinths, Hollow Hills, and Dark Towers. It is used for creating Steeleaf tools and armor pieces. If the player has a Tinkers' Construct tool made of Steeleaf and the component in the hotbar the tool will auto-repair as long as some durability is left—it does not consume any Steeleaf and the rate of repair increases with the quantity possessed; this extends to replenishing ammo on shurikens, arrows, bolts, and throwing knives.