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A hex key, also known as an Allen Key, Allen wrench or hex wrench is a small L shaped or T shaped tool with a 6-sided hexagonal tip which is used to loosen hex socket screws or bolts.

### Types of Hex Key

**L-Shaped Hex Keys:** L Shaped Hex Keys or [L Keys](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4294379624) are the most common type of hex key with a hexagonal tip at each end

**T-Shaped Hex Keys:** T-shaped hex keys or [T bar Allen Keys](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4294379631) have a crossbar or T shaped handle at the end which provides a better grip

**Folding Allen Key Sets:** [Folding Allen Key Sets](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4290511960) consist of an outer casing from which a selection of different sized Allen keys can be unfolded, a bit like a penknife or multi-tool

Hex keys or Allen keys are available in metric sizes and imperial sizes [Imperial Allen Keys](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4294407154). They are also available in [Allen Key Sets](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4290254901) which include a range of popular hex key sizes including [12mm Allen keys](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4291389928). RS also supply Allen keys from leading brands such as [Wera Allen Keys](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4294964448), [Wera Allen Key Sets](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4290254901,4294964448) and [Bondhus Allen Keys](https://uk.rs-online.com/web/c/hand-tools/screwdrivers-hex-torx-keys/hex-keys/?applied-dimensions=4294966929)

For more information please refer to our [Hex Keys Guide](https://uk.rs-online.com/web/content/discovery/ideas-and-advice/hex-keys-guide)

For our range of hex socket screws please see [Socket Screws](https://uk.rs-online.com/web/c/fasteners-fixings/screws-bolts/socket-screws/)



Shop our range of Hex Keys Sets and Allen Keys. Free Next Day Delivery. Browse our latest Hex Keys & Sets offers.

Hex Keys | Allen Keys | Allen Wrenches | RS

Hex Keys

RS PRO 15 piece L Shape Metric Hex Key Set, 1.27 → 10mm

RS PRO 5 piece L Shape Metric Hex Key Set, 4mm

Bondhus 9 piece L Shape Metric Hex Key Set, 1.5 → 10mm

RS PRO 33 piece L Shape Imperial 1.5 → 10mm

Bahco 9 piece L Shape Metric Hex Key Set, 1.5 → 10mm

PB SWISS TOOLS 9 piece L Shape Metric Hex Key Set 2.5 mm 3 mm 5 mm...

Buy 2mm Allen Keys. Browse our latest 2mm Allen Keys offers. Free Next Day Delivery.

2mm Allen Keys | RS

Buy 3mm Allen Keys. Browse our latest 3mm Allen Keys offers. Free Next Day Delivery.

3mm Allen Keys, 3mm Hex Key Sets | RS

Buy 6mm Allen Keys &6mm hex keys. Browse our latest 6mm Allen Keys offers. Free Next Day Delivery.

6mm Allen Keys & Hex Key Sets | RS

Buy Facom Allen Keys. Browse our latest Facom Allen Keys offers. Free Next Day Delivery.

Facom Allen Keys | RS

Buy from our selection of hex keys from Allen. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Allen Hex Keys | RS

Buy from our selection of hex keys from Bahco. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Bahco Hex Keys | RS

Buy from our selection of hex keys from Bondhus. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Bondhus Hex Keys | RS

Buy from our selection of hex keys from Ck. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Ck Hex Keys | RS

Buy 12mm Allen Keys. Browse our latest 12mm Allen Key Offers. Free Next Day Delivery.

12mm Allen Keys | RS

Buy Imperial Allen Keys. Browse our latest Imperial Allen Key Offers. Free Next Day Delivery.

Imperial Allen Keys

Buy Knipex Hex Keys. Browse our latest Knipex Hex Keys offers. Free Next Day Delivery.

Knipex Hex Keys | RS

Buy from our selection of Hex Keys from RS PRO. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

RS PRO Hex Keys | RS

Buy from our selection of Hex Keys from SAM. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

SAM Hex Keys | RS

Buy from our selection of Hex Keys from Teng Tools. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Teng Tools Hex Keys | RS

Buy Long Reach Allen Keys &amp; Long Reach Hex Keys. Browse our latest Long Reach Allen Keys offers.

Long Reach Allen Keys & Long Reach Hex Keys | RS

<p>A long-reach Allen key features an especially elongated side, providing easier access to hex bolts and sockets that are more deeply recessed or located in otherwise tricky-to-access spaces.</p><p>Our range of long-reach Allen keys are manufactured by leading brands like Irwin, Stanley, Bahco, GearWrench, Wiha Tools, Facom, RS PRO, and of course the original trademark designer, Allen.</p><h2>How would you use a long reach hex key?</h2><p>Where the additional access provided by a long-reach hex wrench is needed, you'd use the more elongated side as the ‘driver', and the shorter side therefore becomes the handle that you turn to tighten or loosen the fastener. However, when a hex bolt is within easy reach and there's plenty of space to work in, long-arm Allen keys can also be handy used in the reverse configuration - the longer side can help provide better grip and torque when operating as a handle.</p><h2>What types of long reach Allen keys are available?</h2><p>Long-reach Allen keys are a common feature of most good quality hex key sets, which tend to include a useful range of common wrench sizes and diameters (typically from around 1-1.5mm, up to 12mm and beyond).</p><p>Like all hex wrenches, long-reach Allen keys are also sold with a variety of head and handle types for various more specialised applications - these can include:</p><ul><li>Folding hex keys, for added convenience in storage and transit</li><li>Multi-way Allen wrenches</li><li><a href="/web/c/tools/screwdrivers-screw-extractors/screwdrivers/">Screwdriver</a> handle or straight hex key sets</li><li>P-head Allen keys</li><li>Square head hex keys</li><li>T-handle Allen keys, for more comfortable grip and easier torque</li><li>Ball head hex wrenches, for more convenient positioning in tighter spaces</li></ul>

Buy T Bar Allen Keys. Browse our latest T Bar Allen Keys offers. Free Next Day Delivery.

T Bar Allen Keys | RS

<p> T bar Allen keys, T handle Allen keys or T handle hex keys are a hexagonal Allen key with a T shaped handle at one end which is perpendicular to the shaft. The T shaped handle has an ergonomic design which allows the whole handle to fit comfortably in the palm of the hand with some handles having soft rounded recesses for the fingers. This handle design creates an improved grip and allows the user to apply more torque to screws without causing excessive strain to the hands as well as reducing fatigue if using the tool for prolonged periods of time </p>

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Allen Key Sets | Hex Key Sets | RS

<p>Allen key sets or hex key sets consist of a set of different sized Allen keys in a case or clip for use with a range of hex screw sizes. Allen keys sets include imperial Allen keys sets, metric Allen key sets, L shaped Allen key sets, T Handle Allen key sets as well as combinations of all of these. Allen key sets are practical and convenient as they keep all the Allen keys in one place allowing instant access to the size required, they are also versatile being easy to transport and store. Allen key sets are used by both professionals and DIY enthusiasts in furniture assembly, mechanics, bicycle repair and any other applications that involve working with hexagonal screws. </p>

Shop T Handle Allen Key Sets. Browse our T Handle Allen Key Set Offers. Free Next Day Delivery.

T Handle Allen Key Sets | T Handle Hex Key Sets | RS

<p> T handle Allen key sets or T handle hex key sets consist of a set of different sized T handle Allen keys in a case, stand or clip for use with a range of hex screw sizes. T bar Allen keys have a T shaped handle at one end which provides the user with extra comfort and improved grip as well as making it easier for extra torque to be applied when loosening tight screws. T handle Allen key sets are practical and convenient as they keep all the Allen keys in one place providing instant access to the size required, they are also easy to transport and store. T handle Allen key sets are used by both professionals and DIY enthusiasts in automotive repair and mechanical work and any other application that involves working with hexagonal screws. </p>

Shop Wera Allen Key Sets. Browse our Wera Allen Key Set Offers. Free Next Day Delivery.

Wera Allen Key Sets | Wera Hex Key Sets | RS

<p>Wera is a leading German company that specialises in the manufacture of screwdriving and torque hand tools and has done for many decades to arrive at the stellar global reputation it holds today. Wera Allen key sets or Wera hex key sets are often found in the toolboxes of both professional and DIY enthusiasts owing to their excellent quality and durability. Wera Allen key sets contain Allen keys that are made from high quality materials with durable and hardwearing tips that snugly fit into the head of the fastener without any stripping or slipping. Wera Allen keys use a unique chamfered profile called Hex-Plus which prevents the sharp edges of the Allen key engaging directly with the corners of the hex socket preventing the socket from being rounded off or damaged. The Hex-Plus design also allows increased torque to be applied as the chamfered edges allow a larger contact area between the hex key and the hex socket making tightening and loosening screws easier. The handles of the Allen keys in Wera Allen key sets have a smooth, comfortable surface and some are colour coded to make identification quick and easy. The sets are supplied with clips or small racks to keep all the Allen keys in one place allowing instant access to the size required. Wera Allen key sets are available as both L-shaped Allen key sets and T Handle Allen key sets in a range of sizes both metric and imperial. </p>

Browse our latest Wera Allen Keys offers. Place your order today for our Wera Allen Keys. Fast Delivery.

Wera Allen Keys | Wera Hex Keys | RS

<p>Wera offer a wide range of high quality Hex Keys. Wera is renowned for its innovative designs, attention to detail, and commitment to producing tools that are both functional and ergonomic.</p><h2>What are Wera Hex Keys?</h2><p>Hex keys, also more commonly known as Allen Keys are a are a type of hand tool used to drive and tighten screws or bolts with hexagonal sockets. Wera Hex Keys are renowned for their quality and have some distinctive features which make them so popular. RS offer you a wide range of Hex Keys for all your uses within many industrial settings and in a variety of applications.</p><h2>Why use Wera Hex Keys?</h2><ul><li><strong>Hex-Plus Design</strong>: Wera Hex Keys have a Hex-Plus profile, which has slightly rounded edges on the hexagonal tips. This design helps prevent damage to the screw or bolt head, reducing wear and extending the tools lifespan.</li><li><strong>Color-Coded</strong>: Wera Hex Keys often come with color-coded handles, making it easier to identify the size of the key quickly. Each colour corresponds to a specific size, allowing for quick and efficient tool selection.</li><li><strong>Ergonomic Handles</strong>: Wera focuses on ergonomics and user comfort, so their hex keys typically have ergonomic handles. These handles are designed to provide a secure and comfortable grip, reducing strain and fatigue during extended use.</li><li><strong>High-Quality Materials</strong>: Wera Hex Keys are made from durable and high-quality materials, such as hardened chrome vanadium steel. This ensures that the keys are robust, long-lasting, and capable of withstanding high torque applications.</li></ul><p>Wera offers a wide range of hex keys and hex key sets, both in metric and imperial sizes, to accommodate various applications and requirements. These tools are commonly used in industries like automotive, manufacturing, engineering, and DIY projects where fasteners with hexagonal heads are prevalent.</p>

Allen Hex Keys

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