The Decision Rule Is Simple
Count your independently-moving plates. If 2 → straight. If 3 → one-step. If 4+ → two-step or multiple guides.
When to Use Stepped vs Straight Leader Pins — Decision Guide
Key Takeaway: 2-plate mold = straight. 3-plate mold = stepped. Stack mold = 2-step. Only exception: when all plates have the same thickness AND no independent alignment is needed at the runner level.
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