10 models to compare

Does a vise’s nominal size tell you its jaw opening?

Nominal size cannot give jaw opening. Yost's 4-8 in sizes come from model names; jaw opening, throat depth and mounting dimensions are absent here.

Apprentice and MV-5 use cast grey iron; other named models use ductile iron.

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With no preferences selected: Yost HD650-C Heavy Duty Mechanics Vise is one option to compare.

No hands-on testingMethod and sources

Yost HD650-C Heavy Duty Mechanics Vise · first with a product link

Body material: Ductile iron.

What to note:

Not listed by the maker: nominal size, swivel travel.

View at Yost

If you choose 4 in for nominal size, the first option with a product link becomes Yost Model 204 4 Inch Heavy Duty Machinist Vise with Swivel Base.

10 models compared; 10 have a product-page link.

The picks

5 options to compare

Compare the details that matter to your setup.

An option to compare

Yost HD650-C Heavy Duty Mechanics Vise

Body material: Ductile iron.

What to note

Not listed by the maker: nominal size, swivel travel.

Compare specs: Body material: Ductile iron here; Cast grey iron on Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series.

Body material: Ductile ironNominal size: Not listed by the makerSwivel travel: Not listed by the maker

See all 3 specs

Body materialDuctile iron

Nominal sizeNot listed by the maker

Swivel travelNot listed by the maker

1 of 3 specs available · source checked September 26, 2026 · Source ↗
Yost · Product page checked September 26, 2026

View at Yost Compare

Nominal size: 4 in

Yost Model 204 4 Inch Heavy Duty Machinist Vise with Swivel Base

Nominal size: 4 in.

Key details

Body material: Ductile iron.

What to note

Swivel travel: 360 °.

Compare specs: Nominal size: 4 in here; 6 1/2 in on Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base.

Nominal size: 4 inBody material: Ductile ironSwivel travel: 360 °

See all 3 specs

Nominal size4 in

Body materialDuctile iron

Swivel travel360 °

3 of 3 specs available · source checked September 26, 2026 · Source ↗
Yost · Product page checked September 26, 2026

View at Yost Compare

Nominal size: 4 1/2 in

Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series

Nominal size: 4 1/2 in.

Key details

Body material: Cast grey iron.

What to note

Swivel travel: 360 °.

Compare specs: Nominal size: 4 1/2 in here; 6 1/2 in on Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base.

Nominal size: 4 1/2 inBody material: Cast grey ironSwivel travel: 360 °

See all 3 specs

Nominal size4 1/2 in

Body materialCast grey iron

Swivel travel360 °

3 of 3 specs available · source checked September 26, 2026 · Source ↗
Yost · Product page checked September 26, 2026

View at Yost Compare

Nominal size: 5 in

Yost MV-5 Multipurpose Homeowners Bench Vise

Body material: Cast grey iron.

Key details

Nominal size: 5 in.

What to note

Swivel travel: 360 °.

Compare specs: Body material: Cast grey iron here; Ductile iron on Yost HD650-C Heavy Duty Mechanics Vise.

Nominal size: 5 inBody material: Cast grey ironSwivel travel: 360 °

See all 3 specs

Nominal size5 in

Body materialCast grey iron

Swivel travel360 °

3 of 3 specs available · source checked September 26, 2026 · Source ↗
Yost · Product page checked September 26, 2026

View at Yost Compare

Body material: Austempered ductile iron

Yost Model ADI-6 6 Inch Austempered Ductile Iron Bench Vise

Nominal size: 6 in.

Key details

Swivel travel: 360 °.

What to note

Body material: Austempered ductile iron.

Compare specs: Nominal size: 6 in here; 4 1/2 in on Yost Model LV-4 4-1/2 Inch Homeowners Vise.

Nominal size: 6 inBody material: Austempered ductile ironSwivel travel: 360 °

See all 3 specs

Nominal size6 in

Body materialAustempered ductile iron

Swivel travel360 °

3 of 3 specs available · source checked September 26, 2026 · Source ↗
Yost · Product page checked September 26, 2026

View at Yost Compare

Comparing Yost HD650-C Heavy Duty Mechanics Vise · Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series

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The facts that differ

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0 identical specs shown. Details that do not apply to these models are omitted.

Published specification comparison
Spec	Yost HD650-C Heavy Duty Mechanics ViseNo preferences selected.	Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice SeriesNo preferences selected.
Nominal size	Not listed by the maker	4 1/2 in
Body material	Ductile iron	Cast grey iron
Swivel travel	Not listed by the maker	360 °

Yost HD650-C Heavy Duty Mechanics Vise

No preferences selected.

Nominal size: Not listed by the maker
Body material: Ductile iron
Swivel travel: Not listed by the maker

Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series

No preferences selected.

Nominal size: 4 1/2 in
Body material: Cast grey iron
Swivel travel: 360 °

Yost HD650-C Heavy Duty Mechanics Vise

View at Yost

Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series

View at Yost

Compare all 10 models

— = no verified listing yet. The published order is independent of links.

All models and their decision specs
Product	How it compares	Key spec	Compare	Action
Yost HD650-C Heavy Duty Mechanics Vise	Compared with Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series: body material, Ductile iron vs Cast grey iron.	Body material: Ductile iron	Compare	View at Yost
Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base	Compared with Yost Model 880-D2 8 Inch Multi-Purpose Reversible Combination Vise with Swivel Base: nominal size, 6 1/2 in vs 8 in.	Nominal size: 6 1/2 in	Compare	View at Yost
Yost Model 204 4 Inch Heavy Duty Machinist Vise with Swivel Base	Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: nominal size, 4 in vs 6 1/2 in.	Nominal size: 4 in	Compare	View at Yost
Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series	Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: nominal size, 4 1/2 in vs 6 1/2 in.	Nominal size: 4 1/2 in	Compare	View at Yost
Yost Model 455 5-1/2 Inch Utility Bench Vise Apprentice Series	Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: nominal size, 5 1/2 in vs 6 1/2 in.	Nominal size: 5 1/2 in	Compare	View at Yost
Yost Model 465 6-1/2 Inch Utility Bench Vise Apprentice Series	Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: body material, Cast grey iron vs Ductile iron.	Nominal size: 6 1/2 in	Compare	View at Yost
Yost Model 880-D2 8 Inch Multi-Purpose Reversible Combination Vise with Swivel Base	Compared with Yost Model ADI-6 6 Inch Austempered Ductile Iron Bench Vise: nominal size, 8 in vs 6 in.	Nominal size: 8 in	Compare	View at Yost
Yost Model ADI-6 6 Inch Austempered Ductile Iron Bench Vise	Compared with Yost Model LV-4 4-1/2 Inch Homeowners Vise: nominal size, 6 in vs 4 1/2 in.	Nominal size: 6 in	Compare	View at Yost
Yost Model LV-4 4-1/2 Inch Homeowners Vise	Compared with Yost MV-5 Multipurpose Homeowners Bench Vise: nominal size, 4 1/2 in vs 5 in.	Nominal size: 4 1/2 in	Compare	View at Yost
Yost MV-5 Multipurpose Homeowners Bench Vise	Body material: Cast grey iron; Nominal size: 5 in.	Nominal size: 5 in	Compare	View at Yost

Yost HD650-C Heavy Duty Mechanics Vise

Compared with Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series: body material, Ductile iron vs Cast grey iron.

Body material: Ductile iron

CompareView at Yost

Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base

Compared with Yost Model 880-D2 8 Inch Multi-Purpose Reversible Combination Vise with Swivel Base: nominal size, 6 1/2 in vs 8 in.

Nominal size: 6 1/2 in

CompareView at Yost

Yost Model 204 4 Inch Heavy Duty Machinist Vise with Swivel Base

Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: nominal size, 4 in vs 6 1/2 in.

Nominal size: 4 in

CompareView at Yost

Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series

Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: nominal size, 4 1/2 in vs 6 1/2 in.

Nominal size: 4 1/2 in

CompareView at Yost

Yost Model 455 5-1/2 Inch Utility Bench Vise Apprentice Series

Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: nominal size, 5 1/2 in vs 6 1/2 in.

Nominal size: 5 1/2 in

CompareView at Yost

Yost Model 465 6-1/2 Inch Utility Bench Vise Apprentice Series

Compared with Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: body material, Cast grey iron vs Ductile iron.

Nominal size: 6 1/2 in

CompareView at Yost

Yost Model 880-D2 8 Inch Multi-Purpose Reversible Combination Vise with Swivel Base

Compared with Yost Model ADI-6 6 Inch Austempered Ductile Iron Bench Vise: nominal size, 8 in vs 6 in.

Nominal size: 8 in

CompareView at Yost

10 catalog models

How the comparison works

Your choices are compared with each model’s product details. A missing or conflicting value stays unknown and cannot satisfy a choice you select. The starting order helps you browse; it does not rate real-world performance.

Source dates appear with each link below. A source date does not confirm today's price or stock.

Finder methodology Report a correction

Sources for all 10 models

Yost HD650-C Heavy Duty Mechanics Vise: Source 1 ↗ · September 26, 2026
Yost Model 204 4 Inch Heavy Duty Machinist Vise with Swivel Base: Source 1 ↗ · September 26, 2026
Yost Model 445 4-1/2 Inch Utility Bench Vise Apprentice Series: Source 1 ↗ · September 26, 2026
Yost Model 455 5-1/2 Inch Utility Bench Vise Apprentice Series: Source 1 ↗ · September 26, 2026
Yost Model 465 6-1/2 Inch Utility Bench Vise Apprentice Series: Source 1 ↗ · September 26, 2026
Yost Model 65C 6-1/2 Inch Tradesman Combination Pipe and Bench Vise with Swivel Base: Source 1 ↗ · September 26, 2026
Yost Model 880-D2 8 Inch Multi-Purpose Reversible Combination Vise with Swivel Base: Source 1 ↗ · September 26, 2026
Yost Model ADI-6 6 Inch Austempered Ductile Iron Bench Vise: Source 1 ↗ · September 26, 2026
Yost Model LV-4 4-1/2 Inch Homeowners Vise: Source 1 ↗ · September 26, 2026
Yost MV-5 Multipurpose Homeowners Bench Vise: Source 1 ↗ · September 26, 2026

Nominal vise size is not the opening around your workpiece

Yost's Apprentice utility vises include nominal sizes of 4.5, 5.5 and 6.5 inches. Its reversible combination vise is nominally 8 inches. Yost's size, body and movement descriptions supply the vise details; clamping loads and bench installations were not evaluated. These sizes cannot tell you the maximum jaw opening or throat depth; those measurements need to come from the selected vise's documentation.

The Apprentice bodies use cast grey iron, while the reversible combination model uses ductile iron. The material names alone cannot determine clamping strength or the suitability of a vise for a particular operation.

Swivel travel leaves the bench mounting unresolved

The Yost Homeowners Vise has 240 degrees of swivel travel; the Apprentice options have 360 degrees. The Heavy Duty Mechanics Vise has no usable swivel figure here. An absent figure does not mean a fixed base.

Read the mounting pattern, bench support and fastening instructions before loading a vise.

Before you buy

Which Yost vises swivel a full circle?

Eight of the 9 with a swivel figure turn 360 degrees; the LV-4 Homeowners Vise turns 240 degrees, and the HD650-C gives no figure.

Does body material tell you how strong a vise is?

It names the casting metal and little more. This comparison has no clamping-force figure, so the material choice sorts vises by metal without claiming that one grips harder; the ADI-6 is the one austempered ductile iron body. Construction metal is the clearer split: cast grey iron on the Apprentice Series 445, 455 and 465 and the MV-5; ductile iron on the Model 204, 65C, 880-D2 and HD650-C.

Which sizes sit between the smallest and largest?

Between the ends you get 4 1/2 in (445 and LV-4), 5 in (MV-5), 5 1/2 in (455), 6 in (ADI-6) and 6 1/2 in (65C and 465). For bench fit, the exact model’s documentation gives the mounting footprint.