Higher engineering skill allows you to learn higher level engineering schematics. Schematics can be found on trainers around the world as well as from quests and monsters.
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Arclight SpannerKnown
Bronze TubeKnown
Copper TubeKnown
Silver Contact×5Known
Crafted Heavy Shot×200Known
Crafted Light Shot×200Known
Crafted Solid Shot×200Known
Explosive Arrow×100
Crude ScopeKnown
Rough Dynamite×2Known
Standard ScopeKnown
Flying Tiger GogglesKnown
Practice LockKnown
Tinker: Magnetic Displacement
Tinker: Nitro Boosts
Tinker: Teleport