4″ vs 6″ Bench Vise

A 4″ bench vise is a light-duty tool: smaller jaws, a smaller opening and lower mass, sized for hobby work, electronics and small repairs. A 6″ medium-duty bench vise sits a class up, with wider jaws, a bigger opening and a heavier body built for general metalwork and auto repair.

The extra two inches add jaw area, but the opening matters just as much. A 4″ light vise typically opens around 2-3″, a 4″ light-duty model handles small stock, while a 6″ vise opens far wider and holds castings, pipe and assembled parts the small vise cannot.

Mass is force: the 6″ body delivers noticeably more clamping force and rigidity for sawing and filing under load. If your work regularly pushes hard against the jaws, the 6″ wins without argument.

Both sizes come in gray iron bodies with hardened jaws, but the 6″ class gets more body mass and often a swivel base as standard. The trade-offs of the body materials apply across both.

Go 4″ for small work, tight budgets and light benches; go 6″ if you do general workshop, automotive or metalwork or if you intend to grow into it. The full choosing process walks through every factor.

Sourcing for a product line? The OEM team builds both sizes and can tune jaw, opening and finish to your spec.