Hex & Torx Keys

About Hex & Torx Keys

Hex and Torx keys are essential hand tools found in virtually every professional tradesperson's toolkit and DIY enthusiast's toolbox. These precision-engineered tools provide the torque and grip needed to fasten and unfasten hexagonal socket screws (Allen bolts) and star-shaped Torx fasteners, which are increasingly common across automotive, engineering, furniture assembly, and electronics applications. Available in metric and imperial sizes, hex keys (also known as Allen keys) feature a simple L-shaped or T-handle design, whilst Torx keys utilise a six-pointed star pattern that offers superior torque transfer and reduced cam-out compared to traditional hex designs.

Our comprehensive range includes single keys, folding multi-key sets, ball-end hex keys for angled access, colour-coded sets for quick size identification, and T-handle versions for improved leverage. Whether you're working on precision electronics requiring miniature keys or tackling heavy-duty industrial machinery with jumbo hex sets, we stock trusted brands including Bahco, Draper, BlueSpot, Bosch Professional, and DeWalt. Modern innovations such as locking folding keys, magnetic tips, and ergonomic handle designs have transformed these simple tools into highly efficient problem-solvers for professional and home use alike.

Quality hex and Torx keys are manufactured from hardened chrome vanadium steel or S2 tool steel, ensuring they resist rounding, wear, and corrosion even under demanding site conditions. Many professional-grade sets come with organised storage solutions such as wall racks, pouches, or folding cases that keep your keys accessible and prevent losses on busy job sites. Investing in a comprehensive set means you'll always have the right size to hand, reducing downtime and frustration when working on equipment, machinery, bicycles, or flat-pack furniture.

Jargon Buster

• Ball End Hex Key: A hex key with a rounded (ball-shaped) tip that allows entry into socket head screws at angles up to 25 degrees, providing access in confined spaces where straight-line entry isn't possible.
• Torx (Star Drive): A six-pointed star-shaped fastener design that provides better torque transfer and significantly reduces cam-out (slipping) compared to hex keys, commonly used in automotive and electronics applications.
• Chrome Vanadium (CrV): A steel alloy combining chromium and vanadium that delivers excellent strength, durability, and resistance to wear and corrosion, making it the preferred material for quality hex and Torx keys.
• T-Handle: An ergonomic handle design shaped like the letter 'T' that allows greater torque application and more comfortable grip compared to traditional L-shaped keys, particularly useful for stubborn or high-torque fasteners.
• Imperial vs Metric: Two measurement systems for hex key sizes – imperial uses fractions of inches (1/16", 3/32", etc.) whilst metric uses millimetres (1.5mm, 2mm, etc.). UK tradespeople typically use metric, though imperial sizes remain common in older equipment.
• Long Arm Configuration: Hex or Torx keys with extended shaft lengths that provide increased leverage for loosening tight fasteners or accessing recessed fixings deep within assemblies.

Who Uses Hex & Torx Keys?

Hex and Torx keys are indispensable across numerous trades and applications:

• Mechanics and Vehicle Technicians: Essential for automotive repair, motorcycle maintenance, and servicing engines, brakes, and suspension components
• Engineers and Maintenance Fitters: Required for assembling, maintaining, and repairing industrial machinery, equipment, and manufacturing plant
• Electricians: Used for electrical enclosures, junction boxes, and modern consumer units featuring security fastenings
• Bicycle Mechanics: Critical for adjusting and servicing modern bikes with numerous hex and Torx fasteners throughout frame and components
• Furniture Assemblers: Flat-pack furniture assembly relies heavily on hex keys, often supplied with products but better quality tools speed up work considerably
• Electronics Technicians: Precision miniature hex and Torx keys access delicate computer equipment, smartphones, and electronic devices
• Plumbers and Heating Engineers: Modern taps, valves, and boiler components increasingly use security Torx and hex fastenings
• General Builders and Maintenance Workers: Useful across countless applications from window fittings to door furniture and access panels
• DIY Enthusiasts and Homeowners: Essential for household maintenance, furniture assembly, and general repairs around the home

How to Choose the Right Hex & Torx Keys

Size Range and Measurement System: Determine whether you need metric, imperial, or combination sets. Metric sizes typically range from 1.5mm to 10mm, whilst imperial spans 1/16" to 3/8". Professional sets offer comprehensive coverage, whilst specific trades may only require targeted size ranges.

Set Type and Configuration: L-shaped keys are compact and versatile, folding sets keep multiple sizes organised in a pocket-friendly format, whilst T-handle versions provide superior leverage and comfort for repetitive use. Consider ball-end hex keys if you frequently work in confined spaces requiring angled access.

Material Quality and Durability: Look for chrome vanadium or S2 tool steel construction with hardened tips. Cheaper keys can round off under torque, potentially damaging fasteners. Trusted brands like Bahco, Bosch Professional, and DeWalt offer superior metallurgy that withstands professional demands.

Storage and Organisation: Wall-mounted racks, pouches, and folding cases prevent losses and keep keys organised by size. Colour-coded sets allow instant size identification, speeding up workflow on busy sites where time matters.

Handle Design and Ergonomics: For frequent use, T-handle designs or keys with cushioned grips reduce hand fatigue. Standard L-shaped keys remain ideal for general use and tight access situations.

Specialist Features: Consider magnetic tips for holding fasteners in awkward positions, extra-long arms for increased leverage, or security Torx keys with centre holes for tamper-proof applications common in public installations.

Popular Accessories

• Hex and Torx Bit Sets: Compatible with ratchets, screwdrivers, and power drills for powered fastening applications
• Ratchet Drivers: Accept hex and Torx bits whilst providing quick directional changes without repositioning
• Tool Storage Solutions: Wall racks, drawer organisers, and pouches from Stanley, DeWalt, and Milwaukee systems
• Extension Bars: Increase reach when accessing deeply recessed fasteners
• Bit Holders and Adaptors: Convert standard hex keys into power tool compatible accessories
• Precision Screwdriver Sets: Include miniature hex and Torx drivers for electronics and fine work
• Thread Locking Compounds: Prevent vibration-loosening of critical hex and Torx fasteners
• Penetrating Lubricants: Help free seized or corroded fasteners before applying torque

Frequently Asked Questions

What's the difference between Torx and hex keys?

Hex keys have a six-sided hexagonal profile, whilst Torx keys feature a six-pointed star shape. Torx designs provide superior torque transfer, reduce cam-out (slipping), and allow higher tightening forces without damaging the fastener. They're increasingly popular in automotive and manufacturing applications, though hex keys remain more common in general engineering and furniture assembly.

Should I buy metric or imperial hex keys?

Most modern UK applications use metric sizes (measured in millimetres), particularly in European-manufactured equipment and machinery. However, older British machinery, American imports, and some bicycle components use imperial sizes (measured in inches). Professional tradespeople typically invest in both systems, whilst DIY users should check their most common applications before purchasing.

What do the colour codes on hex key sets mean?

Colour-coded hex and Torx key sets assign different colours to different sizes, allowing instant visual identification without checking markings. This speeds up workflow considerably, particularly on busy job sites or production environments. The colour coding system varies between manufacturers, but each set includes a size guide showing which colour corresponds to which measurement.

Are ball-end hex keys as strong as standard ones?

Ball-end hex keys sacrifice approximately 25% of torque capacity compared to standard straight-cut keys because the rounded tip has less material engaging with the fastener. However, they offer invaluable access advantages in confined spaces where straight-line entry isn't possible. Many professional sets include both types, using standard keys for initial loosening and final tightening, and ball-ends for accessibility.

How do I prevent hex keys from rounding off fasteners?

Always use the correct size key that fits snugly without play, ensure the key is fully inserted into the socket, and apply steady pressure straight into the fastener whilst turning. Quality hardened steel keys from brands like Bahco and Bosch Professional resist deformation better than cheap alternatives. For seized fasteners, apply penetrating lubricant and allow time to work before attempting removal, avoiding excessive force that damages both key and fastener.