An Allen Wrench How-To: Use It Like A Pro!

Reading Time: 10 minutes

It’s a common misconception that the Allen wrench is a small, inconsequential tool. It’s not much more than an L-shaped piece of scrap metal, to be honest. However, when it comes to tools, you can never have too many Allen wrenches. Allen wrenches have a simple appearance, but they pack a powerful punch for torque, especially given their low cost and small size.

Hex-key wrenches and hex keys, which have a hexagonal cross shape, are used to tighten many types of machine screws. In addition, numerous mechanical devices use hex fasteners, such as motorcycle engines, bicycles, and self-assembling furniture (aka Ikea).

Recess holes in the shape of hexagons used for set screws. 

A motorcycle’s engine cover can be mounted flush to an engine case using hex fasteners without protruding bolt heads. Most machines and motors include small set screws, which can only be adjusted with an Allen wrench or belts and pulleys. Compared to Phillips or slotted screwdrivers, Allen wrenches have six contact points for driving, making them less prone to slipping or stripping.

For the most part, DIY furniture kits include an Allen wrench and a set of hex screws. Because it’s so unmarked and tiny, an Allen wrench set is a better option for completing the installation if you misplace the small, unmarked wrench.

Various sizes of metric Allen wrenches and  SAE fractional-inch are on the market. In the long run, buying sets of wrenches saves money over buying them individually. This set comes in all the most common sizes. In addition, SAE and metric should keep Allen wrenches on hand due to the increasing use of metric-size hex screws.

An Allen Wrench How-To: Use It Like A Pro!

One set of Allen wrenches might become disorganized and difficult to locate once you have two groups. Sometimes, the twists are connected to a metal split ring, making it difficult to use a single screwdriver in small spaces until the split ring is removed, however, Allen wrenches are accessible to practically everyone due to the large range of designs available.

They may be folded up like such a pocket knife and carried around with you wherever you go. It can obtain extra torque by unfolding the individual wrenches, each of which becomes a handle. In some constrained areas, though, you’re unable to use the twist mechanics, and tradespeople commonly use hex screws due to their permanent attachment.

If you misplace or damage your old wrench, you may always get a new one. Choose a set that contains both metric sizes and SAE in one container for easy storage when ordering one of these sets.

When it comes to Allen wrenches, I prefer to keep them stored in a small, snap-closed container. As a result, it’s more likely that you’ll misplace a twist, but having ease of access to all the wrenches’ ends outweighs that disadvantage.

Each wrench has a wide grip for additional comfort and power, making it ideal for amplifying torque.

T-handle An Allen essential nut is the final form of such Allen wrench also to be covered. Hex screws are commonly used by mechanics and tradespeople, and these sockets are popular among them.

How To Pick The Best Allen Wrench Set? Consider These Factors

You’ll need an Allen wrench set, whether you’re a beginner or a seasoned technician. One is typically included in do-it-yourself home tool packages. Consider the following factors before purchasing an Allen wrench set: 1.


It’s a good idea to get a unique wrench organizer if you’ve many different wrench sets in your toolbox. However, this isn’t an issue because of the convenience of storage containers included in most Allen wrench sets.

It’s not uncommon for people to carry an affordable Allen wrench set around with them as they go about their daily lives. That sounds great, but it isn’t because those wires interconnecting the gadgets can easily be stretched or cut. Using a plastic clip-on rack, the most preferred method is to mark sizes for convenient identification—clip-on frames made of plastic. There’s often a stand with T-handled Allen wrenches, which is lovely for workbenches but bulky in most toolboxes.


Carbon steel is the most frequent foundation material for Allen wrenches because it has the strengths necessary to deal with the twisted pressure (torque) required to obtain or unfasten a range of Allen screws and bolts. However, manufacturers also offer rust-resistant coats like nickel and black oxide as an alternative to zinc.

Chromium-vanadium and chrome-molybdenum steels (sometimes known as chrome-moly) were removed; however, we found several Allen wrenches. Chrome vanadium steel has a high hardness yet is pliable in the hands of a skilled craftsperson. In addition, the chrome element keeps it from rusting even if you bend it just a little bit. Chrome-molybdenum has the same qualities as chrome but has a higher tensile strength (resistance to shearing or deformation), making it useful for heavy-duty uses like construction.

Intended Function

For the most part, wrenches are shaped to fit neatly around the circumference of the hexagonal bolt or nut they’re meant to fit on. For example, the Allen wrench fits perfectly in a hexagonal recess. Screws and bolts that match into threaded holes or via a plate or clamp and tighten around an exposed nut are typically used with this type of wrench.

Unlike a standard wrench or a socket, an Allen wrench best fits within the fastening instead of on the outside, making it particularly useful in tight spaces. In addition, slotted or Phillips screws have a lower torque rating than Allen head screws, with a higher torque rating. As a result, an Allen wrench comes in handy when dealing with heavy fasteners that need to be tightened with a lot of force.


The length of a standard Allen wrench ranges from one to four inches, making it easy to use two or three fingers to exert pressure. Shorter folding Allen wrenches minimize storage space. Despite the truth that you’ve had less leverage, the large frame will help keep you in position.

T-handled versions will have a much bigger overall size. Tight areas are no match for the torque this wrench can generate. Use several Allen wrenches as necessary to finish the project. Those looking to purchase a set will be happy to hear that excellent news.

Chamfered vs Non-chamfered 

The most common Allen wrench end shape is a hexagonal one, but other forms are available. An L-shaped or even a T-shaped handle is then connected to the end of the blade. The hexagonal tip can be flattened with low-cost tools.

Although looking for a wrench in a fastener’s recess is a pain, this design is flawless. If you use the screwdriver or buckle a lot, the problem will only get worse. Allen wrenches with better quality ends have chamfered corners. It may not seem like much, but it significantly impacts how quickly you can locate the wrench.

Use an Allen wrench with a ball end to make this tool even more helpful. It helps with positioning, but it also makes it possible to apply pressure at an angle, which is useful in reaching screwdrivers or nuts tucked away.

Advantages Of Including These Features

SAE utilizes the inch system, also called imperial, whereas imported products from Asia and Europe use helpful the metric system. SAE

Due to minute differences in fastener sizes, metric Allen wrenches and SAE can also be exchanged when equivalents are readily available. Constraining someone will only create more issues in the future. To save money, buy an Allen wrench set that contains SAE, metric wrenches, and an Allen key.

Each set number on an Allen wrench set differs, allowing a wide variety of combinations to create. It’s not uncommon for wrench sets to contain at least eight different shapes of wrenches to accommodate all of your most frequent needs. A collection of twists with both metric and SAE sizes can include approximately 20 different types of wrenches, as an example.

36 Pack – Metric Allen Wrench Set SAE Wrenches with Ball End   Hex Key Short Arm

36 Pack - Metric Allen Wrench Set SAE Wrenches with Ball End   Hex Key Short Arm


  • Material Alloy Steel
  • Brand Owl Tools
  • Operation Mode Mechanical
  • Head Style Hex

There are 18 Metric, and 18 SAE sizes featuring ball ends across both short and long arms. Beautiful Chrome (Metric) and Black Oxide (SAE) finishes on industrial-strength carbon steel. Every Hex Key has sizes indicated on it for easy selection and organization. 

Due to the relatively small diameter of a wrench, most miniature wrenches will not have a size indicated on the wrench mechanism. Allen Wrenches are indeed a Homeowner’s Have to. They’re suitable for producing bicycles, furnishings, motorcycles, RC cars, equipment, vehicles, guns, and a variety of other items.


Owl Tools (a company based in the United States) is solely concerned with your satisfaction. We do our best to guarantee that each product arrives in perfect condition; however, please contact everyone for a complete refund or exchange if something does not meet your expectations.

36 Pack - Metric Allen Wrench Set SAE Wrenches with Ball End Hex Key Short Arm
  • HUGE 36 PIECE SET - Includes 18 Metric Sizes & 18 SAE Sizes in Both Short Arm & Long Arm with Ball Ends
  • SOLID CARBON CONSTRUCTION - Made from Industrial Strength Carbon Steel in a Beautiful Chrome (Metric) and Black Oxide (SAE) Finish
  • SIZE MARKING ON EACH WRENCH & CASE - Sizes are marked on each Hex Key for Easy Selection & Organization. Please Note Our Smallest...
  • PERFECT ADDITION TO ANY GARAGE - Allen Wrenches are a Must Have for any Homeowner. They're perfect for working on Bicycles,...


  • Provides firm support
  • Long-lasting


  • Directions will be difficult

17pcs Folding MulWark Allen Wrench Set | Standard SAE & Metric  – Driver Hex Key Set Tool 2 Pack

17pcs Folding MulWark Allen Wrench Set | Standard SAE & Metric  - Driver Hex Key Set Tool 2 Pack


  • Brand BULWARK
  • Head Style Hex
  • Material Chrome Vanadium Steel, Rubber

You’ll rarely lose keys with your key set with this item, which integrates a 9 inch key within one handle and eight metric wrenches key into some other. This set performs wonderfully in restricted spaces and is less susceptible to stripping thanks to its ideal mix of strength and permitted angle. 

Comparedextensive to a naked Allen wrench kit, the ergonomic design provides exceptional leverage and torque to assist you to tighten fasteners considerably faster and better in addition, ,. MulWark offers a money-back guarantee on all of its goods. Defective products that have not been misused, mistreated, altered, and repaired would be replaced as soon as possible.


Flexibility Allen head, small foldable design, a comfortable double grip, convenient size markings, and ideal fit for bolts with screw heads are all features of the MulWark 2pk Foldable Hex End Key Sets. In addition, it fits into narrow spaces where a typical straight hex key wouldn’t be able to provide enough torque.

36 Pack - Metric Allen Wrench Set SAE Wrenches with Ball End Hex Key Short Arm
  • COLLAPSIBLE DESIGN OF FOLDING ALLEN WRENCH SET:Designed for great performance, made with high quality materials and a special...
  • AVAILABLE SIZE:Metric: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm,8mm; SAE - 5/64”, 3/32”, 7/64”, 1/8”, 9/64”, 5/32”,...
  • TOP QUALITY & EASY TO USE:High-grade alloy steel for maximum performance. With ideal balance between strength and allowable angle,...
  • COMFORTABLE GRIP:The ergonomic handle provides great leverage and torque to help you tighten fasteners much better and faster,...


  • Non-slip


  • Pricy

30-Piece HORUSDY  Allen Wrench Set Hex Key Set,(0.7mm-10mm) Inch/Metric MM SAE(0.028″-3/8)

30-Piece HORUSDY  Allen Wrench Set Hex Key Set,(0.7mm-10mm) Inch/Metric MM SAE(0.028


  • Brand HORUSDY
  • Item Dimensions 5.6L x 1.4W x 7.7H inches
  • Item Weight 1.75 Pounds
  • Head Style Hex
  • Operation Mode Mechanical

Fifteen long reach keys and 15 high leverage minor keys are made of heat-treated metal with a sleek black. On the short and long length keys, the typical drive end enables substantial leverage on stubborn fixes. In addition, each wrench has high-visibility dimensions marked on it and a durable carrying box for quick size selection and organizing.


This Allen key set contains both inch and metric measurements and completely supports all hexagon receptacle screws. Never compare this Allen key set to any other box testing Allen key set. They come from different manufacturing companies.

HORUSDY 30-Piece Hex Key Set, Allen Wrench Set Inch/Metric MM(0.7mm-10mm) SAE(0.028"-3/8)
  • Heat-treated steel with black-oxide finish, contains 15 pieces of long reach keys and 15 pieces of high leverage short keys.
  • The conventional drive end on both the long and short length keys, allows high leverage on stubborn fixings.
  • Come with a torque handle for adding force when loading and unloading the fasteners,Increase extra reach and greater torque.
  • This 30-pieces AlHigh-visibility sizes marked on each wrench and sturdy carrying case for fast size selection and easy...


  • Hand keys with various size
  • Excellent for loosening


  • It will Rust

74208 9 Piece GreatNeck Folding Hex Key Set SAE, Allen Key Set, Wrench Labeled Sizes

74208 9 Piece GreatNeck Folding Hex Key Set SAE, Allen Key Set, Wrench Labeled Sizes


  • Item Weight ‎5.3 ounces
  • Material ‎Steel
  • Head Style ‎Hex

Each Allen wrench set is designed to fit bolts as well as screw heads perfectly. These Allen keys may be adjusted for greater or less torque or fit into tighter areas than conventional hex keys. For simple identification, our hex set contains clearly labeled wrench sizes as well as a color-coded housing. Selecting the proper hex-right tools for the job is quick and easy with a hex wrench set. This Allen wrench hex kit was built to last a long time and is used in various situations. For strength and endurance, the hex keys are composed of hardened as well as tempered steel.


The keys of a hex toolset are resistant to rust as well as corrosion. Hex set equipment gives maximum comfort when doing repairs or routine maintenance; Perfect for assembly things; These hex key settings include an ergonomic grip ensuring sturdy and comfortable operation. Hardened as well as Tempered CR-V Steel; Sturdy Composite Construction; Marked Wrench Sizes; Comfortable Grip Body Color-Coded

74208 9 Piece GreatNeck Folding Hex Key Set SAE, Allen Key Set, Wrench Labeled Sizes
  • ADJUSTABLE FASTENERS: This folding Allen wrench set provides a perfect fit for bolts and screw heads; These Allen keys can be...
  • CONVENIENT FEATURES: Our hex set includes clearly labeled wrench sizes and a color-coded body for easy identification; Hex wrench...
  • DURABLE CONSTRUCTION: This Allen wrench hex set is constructed for longer life and extended rugged use; Hex keys set is made of...
  • COMFORTABLE TO USE: These hex key sets feature an ergonomic grip for steady and comfortable use; Hex set tools provide maximum...


  • We can use this on. both sides
  • Secure and safer


  • May be slip easily

10111 Hex-L EKLIND Key Allen wrench – SAE Inch Sizes11pc set.050-1/4 Short series

10111 Hex-L EKLIND Key Allen wrench - SAE Inch Sizes11pc set.050-1/4 Short series


  • Item Weight 0.14 Pounds
  • Item Dimensions 6L x 4W x 1H inches
  • Material Blend
  • Brand Eklind
  • Head Style Hex
  • Item Weight 0.14 Pounds

The long arm is designed with a spherical profile. Allows for 360-degree movement at a 35-degree inclination. A burr-free shorter component includes allowing the operator to apply thrust force in specified applications. The sets come in a range of inch as well as metric sizes. Length, Bright, Extra-Long Lively, and Stubby series pairs are also available. These keys meet Eklind’s high-quality requirements, ensuring complete customer satisfaction. From 1950, EKLIND Tools COMPANY has been the leading maker of high-quality, manufacturing hex keys inside the United States. Professional technicians, tradespeople, performers, and enthusiasts will appreciate 1/4 Short series.


Eklind L-Keys ake of Elkind Alloy Steel of the highest grade. They’ve been heat treated for optimal strength and have a rust-resistant finish. Eklund’s exceptional quality ensures maximum torque and prevents the key with hex socket from rounding out. This Eklind 10111, Hex-L Keys Inches Short Arms 11-Piece pack contains a handy compact molded holder that keeps each key securely in place. The molded holder is the color scheme, making it easy to identify; red denotes inch sizes, while blue denotes metric sizes.

10111 Hex-L EKLIND Key Allen wrench - SAE Inch Sizes11pc set.050-1/4 Short series
  • MADE IN AMERICA- High quality, Industrial Grade Professional Tools made in the U.S.A.
  • SMALL SAE SET contains all of the smaller, common, popular INCH Sizes:.050, 1/16, 5/64, 3/32, 7/64, 1/8 , 9/64, 5/32, 3/16, 7/32,...
  • EKLIND hex keys (allen wrenches) are used to drive internal hexagon socket (allen head) fasteners
  • OPTIMUM STRENGTH- These EKLIND tools are made with EKLIND Alloy Steel that is heat treated, quenched and tempered for optimum...


  • Distinct L-shape
  • Narrow spaces


  • Avoid putting much leverage.

Final Thoughts:

When we compared, Our favorite Allen wrench is 36 Pack – Metric Allen Wrench Set SAE Wrenches with Ball End   Hex Key Short Arm is the best Allen wrench that came out ahead. Allen wrenches prevent fasteners from being stripped unintentionally. They’ll “grab” fasteners smoother than other popular screwdrivers as well as wrenches because they’re designed for hexagonal fasteners. Fittings Were protected from becoming stripped during placement or removal by this decisive gripping action.

An Allen Wrench How-To: Use It Like A Pro!

Thank you for reading!