Best Hex Key Set Under 20
Best hex key set under 20: five sets from 9 to 31 pieces, in folding, L-shape and long-arm designs, compared by sizes, material and storage.
On this page
Top picks at a glance
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- 1
Most SizesAMM 31-Piece Hex Key Set9.2/10View on Amazon - 2
Best FoldingTopline 25-Piece Folding Set9.2/10View on Amazon - 3
Best Long-ArmInPower 26-Piece Long-Arm Set9.2/10View on Amazon - 4
Best HolderKraftek 26-Piece Long-Arm Set9.2/10View on Amazon - 5
Best 9-PieceZoikuloi 9-Piece Hex Key Set9.2/10View on Amazon - 6
Amazon Basics Folding Hex Key SetView on Amazon - 7
SWANLAKE 20PCS Power Nut Driver Set for Impact DrillView on Amazon - 8
20PCS 4 Inch S2 Magnetic Hex Bit Set Metric SAE Impact DrillView on Amazon - 9
AMM 107PCS Allen and Torx bit socket setView on Amazon
Every bolt with a hexagonal socket is a job for a hex key, and the best hex key set under 20 covers the sizes you will actually meet without the tool-truck price. The five sets below were picked from current listings and ranked by what their listings actually promise: piece count, size range, material, design and storage. From folding pocket sets to full 31-piece L-key collections, one of these fits the drawer.
Size is the whole game with hex keys. A set that skips the size you need is a paperweight, which is why the listings here lead with their size ranges: 0.028 to 3/8 inch SAE and 0.7 to 10 mm metric on the AMM, T9 to T40 Torx on the Topline, and 1.27 to 10 mm metric on the Kraftek. Count the fasteners in your life before you count the pieces in the set. The listings make this easy: every one of them prints its full size range, so compare the ranges side by side and pick the set whose smallest and largest keys match your work.
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Quick picks
- Most Sizes AMM 31-Piece Hex Key Set: 31 pieces in SAE and metric with a T-handle and case. Check price on Amazon
- Best Folding Topline 25-Piece Folding Set: 25 pieces: metric, SAE and Torx in 3 folding handles. Check price on Amazon
- Best Long-Arm InPower 26-Piece Long-Arm Set: 26 pieces with ball ends and color-coded cases. Check price on Amazon
- Best Holder Kraftek 26-Piece Long-Arm Set: 26 pieces with ball ends in a quick-access holder. Check price on Amazon
- Best 9-Piece Zoikuloi 9-Piece Hex Key Set: Metric ball-end set in a pressure-resistant box. Check price on Amazon
The picks
31-Piece Hex Key Wrench Set
A 31-piece L-shape hex key set with 15 SAE sizes from 0.028 to 3/8 inch and 15 metric from 0.7 to 10 mm in chrome vanadium steel, with a T-handle and a foldable case with indexed slots, weighing 2 pounds.
Pros
- 31 pieces: the widest size range here
- SAE and metric cover cars, bikes and machinery
- T-handle included for extra leverage
- Indexed slots keep every key findable
Cons
- 2 pounds is heavy for a pocket set
- No Torx keys included
- Foldable case adds bulk
- 31 pieces is more than basic jobs need
Topline 25-Piece Folding Allen Wrench Set
A 25-piece folding hex key set in three handles: 8 metric, 9 SAE and 8 Torx keys in heat-treated chrome vanadium steel with black oxide finish, weighing 5.28 ounces.
Pros
- Only set here with Torx keys, T9 to T40
- Three folding handles fit a pocket
- Metric and SAE cover most fasteners
- Size markings on keys and handles
Cons
- Folding handles limit leverage vs L-keys
- No storage case beyond the handles
- 25 pieces, fewer than the AMM
- Torx only to T40
Allen Wrenches Set, 26pcs SAE and Metric Allen Key
A 26-piece long-arm ball-end hex key set with 13 metric and 13 SAE keys in chrome vanadium steel, in color-coded hinged storage cases, weighing 0.79 kg.
Pros
- Long arms give reach and leverage
- Ball ends allow 25-degree angled access
- 13 metric plus 13 SAE covers most jobs
- Color-coded cases: red inch, blue metric
Cons
- No Torx keys included
- 0.79 kg with cases
- Two cases to keep track of
- No T-handle included
toolant Allen Wrenches Sets 26pcs(Metric&SAE)
A 26-piece long-arm ball-end hex key set with 13 metric keys from 1.27 to 10 mm and 13 SAE from 3/64 to 3/8 inch in CR-V steel, in a quick-access holder.
Pros
- Long arms for stubborn bolts
- Ball ends for 25-degree angled access
- Metric 1.27-10 mm plus SAE 3/64-3/8 in
- Quick-access holder keeps keys organized
Cons
- No Torx keys included
- No stated weight
- Holder less protective than a case
- No T-handle included
9 PCS Hex Key Set, Ball-End Allen Wrench Set
A 9-piece ball-end hex key set in metric 1.5 to 10 mm in chrome vanadium steel, in a pressure-resistant PP storage box, weighing 0.33 kg.
Pros
- Ball ends for angled entry in tight spots
- 1.5-10 mm covers common metric fasteners
- Pressure-resistant storage box
- Laser-engraved sizes for quick ID
Cons
- Metric only, no SAE or Torx
- 9 pieces, the fewest here
- No long-arm leverage
- 0.33 kg for just 9 keys
More options to compare
Amazon Basics Folding Hex Key SetCheck price on Amazon
SWANLAKE 20PCS Power Nut Driver Set for Impact DrillCheck price on Amazon
20PCS 4 Inch S2 Magnetic Hex Bit Set Metric SAE Impact DrillCheck price on Amazon
AMM 107PCS Allen and Torx bit socket setCheck price on Amazon
Compare the picks
| Hex key set | Pieces | Styles | Best for |
|---|---|---|---|
| AMM 31-Piece Set | 31 | L-shape, SAE + metric | Maximum coverage |
| Topline 25-Piece Folding | 25 | Folding, SAE + metric + Torx | Portability |
| InPower 26-Piece Long-Arm | 26 | Long-arm ball end | Reach and leverage |
| Kraftek 26-Piece Long-Arm | 26 | Long-arm ball end | Organized storage |
| Zoikuloi 9-Piece Set | 9 | L-shape ball end, metric | Basic metric work |
Specifications are manufacturer rated, as published on each listing and collected 22 October 2026. “Not stated” means the listing does not give the figure.
How we scored them
Performance weighs the size range and the key design: full SAE plus metric coverage with ball ends for angled access scores over metric-only sets. Build covers the steel and finish, from black oxide to polished chrome vanadium. Value compares piece count and storage against the price ceiling of this guide. Safety scores stated safety features, and none of the listings states a safety certification. Warranty scores only a stated term, and none of the five listings states one.
| Product | Shop Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| AMM 31-Piece Hex Key Set | 9.2 | 10 | 10 | 10 | n/a | 0 |
| Topline 25-Piece Folding Set | 9.2 | 9 | 10 | 10 | n/a | 0 |
| InPower 26-Piece Long-Arm Set | 9.2 | 9 | 10 | 9 | n/a | 0 |
| Kraftek 26-Piece Long-Arm Set | 9.2 | 9 | 9 | 9 | n/a | 0 |
| Zoikuloi 9-Piece Hex Key Set | 9.2 | 8 | 9 | 9 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
What the listings tell you
Read the five listings side by side and coverage splits the field. The AMM 31-piece set is the coverage king: 15 SAE sizes from 0.028 to 3/8 inch and 15 metric from 0.7 to 10 mm, plus a T-handle, in a foldable case with indexed slots. The Topline 25-piece folding set is the portability pick: 8 metric, 9 SAE and 8 Torx keys in three folding handles that fit a pocket. The InPower and Kraftek 26-piece sets are the long-arm twins: 13 metric and 13 SAE each, with ball ends for up to 25 degrees of angled access. The Zoikuloi 9-piece is the minimalist: metric 1.5 to 10 mm ball-end keys in a pressure-resistant box.
Material is consistent: all five list chrome vanadium steel, with the Topline and AMM adding a black oxide finish. Weight tells the portability story: the Topline folding set is 5.28 ounces, the Zoikuloi 0.33 kg, the InPower 0.79 kg, and the AMM 2 pounds for the full 31-piece collection. If the set lives in a pocket, weight matters; if it lives in a drawer, it does not.
Buying guide: the best hex key set under 20
Coverage: SAE, metric and Torx
Start with the sizes you will meet. SAE and metric together cover cars, bikes, furniture and machinery; the AMM, InPower and Kraftek sets all include both. Torx is the bonus: only the Topline includes 8 Torx keys from T9 to T40, which matters for modern fasteners. A metric-only set like the Zoikuloi is fine for bicycles and furniture, but it will leave you borrowing when an SAE bolt shows up. Check the small end too. The AMM goes down to 0.028 inch and 0.7 mm, and the Kraftek to 1.27 mm and 3/64 inch; tiny fasteners on electronics and instruments need those mini sizes. A set that starts at 1.5 mm will not help with a 0.9 mm grub screw.
Folding, L-shape or long-arm
The format decides how you work. Folding sets like the Topline keep every key in one handle, which suits a pocket or a saddlebag. L-shape keys like the AMM and Zoikuloi give two ends: a long arm for reach and a short arm for leverage. Long-arm ball-end sets like the InPower and Kraftek add angled access up to 25 degrees, which is the difference between reaching a buried bolt and removing half the assembly to get at it. Length is leverage. The AMM lists 7.68 inches, which gives the long arm real breaking power on stuck fasteners. Short keys are for tight spaces, not for force; reaching for a cheater bar on a folding key is how keys and knuckles get broken.
Ball ends and storage
Ball ends are worth seeking out. The Zoikuloi, InPower and Kraftek listings all describe ball-end designs that allow angled entry, which turns impossible fasteners into merely awkward ones. Storage keeps the set usable: the AMM has indexed slots in a foldable case, the InPower uses color-coded hinged cases in red for inch and blue for metric, and the Kraftek uses a quick-access holder. A set scattered loose in a drawer loses keys; a cased set keeps them. Material is the quiet spec. All five list chrome vanadium steel, and the Topline and AMM add black oxide for corrosion resistance. At this price you will not get tool-truck steel, but chrome vanadium from a straight listing is honest steel that holds up to home and garage work.
Garage Fit Check
- Match the key to the fastener exactly; a close-enough key rounds out the socket.
- Use the long arm for reach and the short arm for final torque, not the other way around.
- Keep ball-end keys for angled access and straight ends for maximum torque.
- Return every key to its slot or holder after use so the set stays complete.
Use rated jack stands on solid ground, wear eye protection with power and air tools, keep fuel-burning equipment out of a closed garage, and follow the manual for every tool. Read our Safety Disclaimer.
Frequently Asked Questions
What is the difference between SAE and metric hex keys?
SAE keys fit inch-sized fasteners and metric keys fit millimeter fasteners; they are not interchangeable. The AMM, InPower and Kraftek sets include both, with SAE from 0.028 to 3/8 inch and metric from 0.7 to 10 mm on the AMM. If you work on cars and bikes, you need both.
Are ball-end hex keys worth it?
Yes, for tight spots. The Zoikuloi, InPower and Kraftek listings describe ball ends that allow up to 25 degrees of angled entry, so you can turn a fastener you cannot approach straight-on. For maximum torque on a stubborn bolt, use the straight end instead.
Do I need Torx keys too?
It depends on your fasteners. Only the Topline set here includes Torx, with 8 keys from T9 to T40. Modern cars, bikes and electronics use Torx widely, so a set that includes them saves a second purchase.
How do I keep a hex key set organized?
Buy the storage, not just the keys. The AMM comes in a foldable case with indexed slots, the InPower in color-coded hinged cases, and the Kraftek in a quick-access holder. Folding sets like the Topline keep themselves together by design.
Which set is best for a bicycle?
The Zoikuloi 9-piece covers metric 1.5 to 10 mm, which handles most bicycle fasteners, in a portable box. For a full home shop that also does cars and furniture, the AMM 31-piece or Topline 25-piece covers far more ground.
Related
Related: the best hex key set guide, the Torx vs hex socket set comparison and our engine and shop equipment hub.
