A comprehensive set hex keys (or Allen keys) should be considered mandatory for every toolbox. Not only are they among the most versatile and practical hand tools in existence, they’re also far from expensive. In this introductory guide, we’ll take a look at the different hex keys available and how they differ from one another.
Are torx and Allen keys the same?
The answer is no – torx and Allen keys are not the same. They’re used for more or less the same purpose, though Torx keys feature a star or asterisk-shaped cross-section, rather than the hexagonal shape of an Allen key.
As for which of the two is best, the short answer is they are both extremely useful. Torx keys and Allen keys can both be used with equal effectiveness, therefore it is more a case of personal preference. Some users prefer the asterisk-shaped cross section of a Torx key for ease of use. But the quality of the keys, screws and bolts you use is ultimately more important than the shape.
Different types of hex keys and torx keys
Technically speaking, the vast majority of hex keys and torx keys are designed to fulfil the exact same purpose. The only difference being the shape and design of the tool can make it easier or more difficult to work with screws, bolts and fastenings in specific locations.
Here’s a brief overview of the primary types:
L-shaped Allen keys
This is by far the most common and popular type of hex wrench available, which resembles a capital L. They’re usually the smallest, lightest and most inexpensive keys. They are available in diameters ranging from around 1mm to 10mm in diameter. L-shaped wrenches are exceptionally convenient and easy to use. However, they can be quite uncomfortable when dealing with difficult jobs or handling them for long periods.
T-handle hex keys
The T-handle type improves on the comfort of the traditional hex key with a T-shaped design. This enables the user to get a much stronger and more comfortable grip on the tool. T-handle wrenches are also available in an equally diverse range of sizes and specifications, though are not suitable for all applications due to their shape. They also tend to be more expensive than traditional L-shaped keys.
P-handle torx keys
An indispensable tool for all garages and workshops, the P-handle wrench combines the practicality and versatility of a traditional hex wrench with the greater grip and comfort of a T-wrench. Particularly useful when something needs screwing with as much power as possible, the P-handle wrench is the perfect tool for the job.
Multi-way hex keys
This is the generic name for a tool that features hex keys of multiple sizes on protruding arms. Not in the foldable sense, but by way of a tool that has (usually) three or more hex keys fixed in different directions, with a plastic or metallic grip to the centre.
Folding Allen keys
Folding hex and torx keys represent the ultimate in convenience and practicality. Often packing an entire set of keys into a very compact tool, folding keys are portable, practical and perfect for light-duty operations. On the downside, they can be extremely limited in terms of clearance and leverage. Therefore folding wrench keys may not be suitable for heavy-duty or work or within a tight space.
Ratchet keys
At the opposite end of the scale, ratchet keys perfectly suited for heavy-duty work. Ratchet keys and drivers have the added bonus of being compatible with most drills and powered drivers, making it even easier to drive the screws, bolts and bits into place.
Screwdriver-style keys
Excellent in terms of both practicality and value for money, a screwdriver style hex key combines the familiarity of a screwdriver, with an Allen key head. As is the case with most other hex keys, sizes usually vary from 1mm up to 10mm in diameter. Other varieties are available for specialist applications.
What’s a balldriver end?
Balldriver ended screwdrivers (and hex/Torx wrenches) are those that feature a rounded end, which makes it possible to drive bolts in and out at an angle. This can be extremely useful when attempting to reach screws and bolts in difficult places. Balldriver ends do not provide nearly as much torque or traction as standard hex or torx keys.
Beware low quality Allen keys
Never compromise on quality when choosing your hex keys. By their very nature, cheap hex and torx keys are prone to being stripped completely after just a handful of heavy uses, rendering them 100% useless. If you plan on buying hex keys for any purpose, ensure they are manufactured from the highest quality materials from a manufacturer you can trust.
