How opening sizing works
Max-open ladder, class matching, and shop safety.
Bench vise opening sizing
Enter the opening you need in inches. Get the smallest 4 / 6 / 8 in jaw class — or NO_MATCH. Bolt to a sturdy bench; eye protection; keep hands clear of pinch points.
Match the smallest class where class.maxOpen ≥ opening_in. Classes: 4 in jaw (max open 4.7 in) · 6 in jaw (max open 6 in) · 8 in jaw (max open 8 in). Above 8 in → NO_MATCH. Bolt to a sturdy bench; never use as a press/anvil beyond rating; eye protection; pinch points; pipe jaws have separate diameter limits.
Max-open ladder, class matching, and shop safety.
Same tool with room for examples.
When each class fits — and when none do.
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