Adjustable Wrench Sizes: Opening and Length Chart
Adjustable wrench sizes run by length, and the jaw opening grows with it: this guide charts the common sizes and compares 4 wrench sets by opening, scales and grip.
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WORKPRO 4-Piece Wide Jaw Adjustable Wrench Set9.6/10View on Amazon - 2
HORUSDY 3-Piece Adjustable Wrench Set (6/8/10 in)9.6/10View on Amazon - 3
SK 3-Piece Adjustable Wrench Set, 6", 8", 10"9.6/10View on Amazon - 4
Dewalt DWHT75497 2 Pc. Dip Grip Adjustable Wrench9.4/10View on Amazon
A rounded plumbing fitting under the sink, a mower blade bolt that will not move, a bracket that needs another turn: the job calls for a wrench that fits the fastener in front of you. Adjustable wrench sizes answer that call, with a wrench that opens to fit the fastener, named by length, and a jaw that opens wider as the wrench gets longer. This guide charts the common sizes, explains how length and jaw opening relate, and compares the wrench sets below.
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Below: length and jaw opening, a size chart, how to pick the right size, and the wrench sets.
WORKPRO 4-Piece Wide Jaw Adjustable Wrench Set
A 4-piece wide jaw adjustable wrench set in 6, 8, 10 and 12 inch with chrome plating, SAE and metric scales and rubber grips.
Pros
- 4 sizes in the set: 6, 8, 10 and 12 inch
- Jaw openings from 20 to 35 mm across the set
- Metric and SAE scales on every wrench
- Rubber grip and smooth worm gear
Cons
- No warranty term is stated
- Carbon steel rather than chrome vanadium steel
- No storage case stated
- 4 wrenches take more rail space than a smaller set
HORUSDY 3-Piece Adjustable Wrench Set (6/8/10 in)
A 3-piece adjustable wrench set in 6, 8 and 10 inch with wide jaws, chrome vanadium steel, a black oxide finish and metric and SAE scales.
Pros
- 3 sizes in the set: 6, 8 and 10 inch
- Jaw openings from 0.94 to 1.38 in
- Metric and SAE scales engraved on the jaw
- Heat-treated chrome vanadium steel with a black oxide finish
Cons
- No 12-inch wrench in the set
- Jaw opening tops out at 1.38 in
- No rubber grip stated
- No storage case stated
SK 3-Piece Adjustable Wrench Set, 6", 8", 10"
A 3-piece adjustable wrench set in 6, 8 and 10 inch with X-frame handles, chrome vanadium steel and a chrome-plated finish.
Pros
- 3 common sizes: 6, 8 and 10 inch
- SAE and metric scales on the front and back of each wrench
- X-frame handle design for a sturdy build
- Chrome plating resists corrosion and wipes clean
Cons
- No 12-inch wrench in the set
- No rubber grip stated
- No storage case stated
- Largest wrench is 10 inch, so bigger fasteners need a larger wrench
Dewalt DWHT75497 2 Pc. Dip Grip Adjustable Wrench
A 2-piece dip grip adjustable wrench set with armor coating and wide jaw capacity.
Pros
- Dip grip coating helps control in wet conditions
- Armor coating helps prevent the vinyl from peeling
- Wide jaw capacity covers a range of sizes
- 2 wrenches in the pack for home and shop use
Cons
- Wrench sizes are not stated
- Jaw opening is not stated in numbers
- No 10-inch or 12-inch size stated
- No warranty term is stated
Adjustable wrench sizes: opening and length chart
An adjustable wrench takes its size name from its overall length. The jaw opening grows with that length, so a longer wrench fits a larger fastener. The chart below lists the sets in this guide by length, jaw opening and scales.
| Set | Wrench sizes | Jaw opening | Scales |
|---|---|---|---|
| HORUSDY 3-piece set | 6, 8 and 10 inch | 0.94 to 1.38 in | Metric and SAE |
| DEWALT dip grip set | Not stated | Wide jaw capacity | Not stated |
| SK 3-piece set | 6, 8 and 10 inch | Listed per wrench size | SAE and metric |
| WORKPRO 4-piece set | 6, 8, 10 and 12 inch | 20 to 35 mm | Metric and SAE |
How to pick the right adjustable wrench size
Check the fastener, then pick the wrench: the jaw must open wide enough to slip over the flats, and the length must give the reach the job needs. A short wrench suits tight spots, while a longer wrench with a wider jaw covers larger nuts and bolts. Metric and SAE scales let the jaw be set before turning, and a smooth worm gear keeps the setting from slipping.
For a home set, a 3-piece set in 6, 8 and 10 inch covers most small and mid-size fasteners, and a 4-piece set that adds a 12-inch wrench reaches larger ones. The WORKPRO set lists jaw openings from 20 to 35 mm, while the HORUSDY set lists jaw openings from 0.94 to 1.38 in.
Read the manual before first use, wear eye protection, keep the work area clear and ventilated, and stay within every stated rating. Read our Safety Disclaimer.
Adjustable wrench sets for every size
Once the jaw opening the job needs is clear, these sets cover the sizes in the chart above, from a 2-piece set to a 4-piece set with a 12-inch wrench.
FAQ: garage tools
What size adjustable wrench do I need for plumbing work?
Plumbing work is listed as a use for the HORUSDY and WORKPRO sets. The WORKPRO 4-piece set covers 6, 8, 10 and 12 inch with jaw openings from 20 to 35 mm, so it reaches larger fittings, while a 3-piece set in 6, 8 and 10 inch suits smaller fittings and tight spots.
What does jaw opening mean on an adjustable wrench?
Jaw opening is the widest the sliding jaw opens, and it sets the largest fastener the wrench can grip. The HORUSDY set lists jaw openings from 0.94 to 1.38 in, and the WORKPRO set lists jaw openings from 20 to 35 mm.
Do adjustable wrenches show metric and SAE sizes?
The HORUSDY, SK and WORKPRO sets list both metric and SAE scales on the jaw, so the jaw can be set from either scale. The DEWALT set does not state its scales, so confirm them before ordering if scales matter.
Can a 2-piece set cover the same jobs as a 4-piece set?
A 2-piece set covers fewer sizes than a 4-piece set, so it suits a drawer that already holds other wrenches or a job with a known fastener size. The WORKPRO 4-piece set covers 6, 8, 10 and 12 inch, which suits a home garage facing a mix of fastener sizes.
How do I store adjustable wrenches?
The HORUSDY, SK and WORKPRO wrenches each have a hanging hole at the handle end, so they can hang on hooks or tool racks. Hanging keeps the set visible and the jaws clear of other tools.
Related: our picks for the best wide jaw adjustable wrench, the best long adjustable wrench, adjustable vs combination wrench and the best open end ratcheting wrench set. Also see our how we pick page.
