Higher smithing skill allows you to learn higher level smithing plans. Blacksmithing plans can be found on trainers around the world as well as from quests and monsters.
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Coarse WeightstoneKnown
Rough WeightstoneKnown
Copper Chain BeltKnown
Copper BracersKnown
Copper RodKnown
Sharpening WheelKnown
Runed Copper BeltKnown
Copper Chain PantsKnown
Rough Copper VestKnown
Thick War AxeKnown
Gemmed Copper BootsKnown
Rough Grinding StoneKnown