What they are
Jigs guide tools; fixtures hold parts. Both are workholding aids built to make an operation repeatable — drilling in the same place every time, welding at the same angle, assembling in the same order.
Why they appear in quotes
Fixture-making is a one-time cost that buys consistency across the run. Like tooling, clarify who pays, who owns them, and whether they are kept for repeat orders.
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