What is a Hex Key Set
A hex key set is a set of keys used to drive a bolt with a hexagonal socket on top. A hex key is also commonly called an Allen key or hex wrench. It fits the hex head bolt as a key fits in the lock so that you can screw or unscrew the bolt with ease. Hex key set has many keys to fit varying hex head bolt sizes.
What is a Hex Key Set used for?
It is a fundamental toolset to have at your disposal because you will encounter hex bolts on almost every other piece of engineering, from bikes to bridges. Typical uses include fixing furniture, automobiles, heavy machinery, electronics, and other machinery.
How to Pick the Best Hex Key Set?
The best hex key sets will take a lot of abuse year after year and still keep their edges sharp and shape intact. We have listed below the most essential points to consider in a hex set that will serve you for a long time.
The shape of the hex key wrench
Tool manufacturers offer hex keys in many different shapes to target varying customer needs and scenarios.
L-Shape
is the most basic and standard shape of hex wrenches in the market. They do not come with grip support, but usually, that does not reduce the tool’s effectiveness.
T-Shape
offers a handle for better maneuvering, often needed to unscrew very tight hex head bolts. It looks a bit fancier than L-shape, but it is not just a pretty face. You can spot it in professional settings such as motorsports because it offers better speed and efficiency.
P-Shape
is not actually shaped like a letter P; it is simply a variation of L-shape or T-shape. The only difference is that it has a handle with a hole on one side of the handle for better grip.
Storage of hex keys
Out of a hex key set, some hex keys will be used more than the others. Losing a key often means replacing the whole set to keep the consistency of grip and feel with the other hex wrenches. Here is a list of different types of storage mechanisms available in the market.
Folding hex keys
can be used just like a swiss knife by unfolding when needed and folding back again in the case itself. It is the easiest of all options to manage and carry around but not the best option for repetitive usage.
Case/holders
are very common these days for hex keys as they can be carried to the place of work. Hex key required at the moment can be lifted out of the holder easily and dropped back into its designated hole after use. Some sets come with color-coded hex keys for a quick draw.
Size ranges
Usually, hex keys sets come as a pack of 10 keys ranging from 2mm to 10mm. Another standard range is a pack of 30 keys ranging from 0.5mm to 10mm. Still, these are usually available in only L-shape. Your choice will depend on the range of bolt sizes you expect to encounter and targeted ease of use, among other factors listed in this guide.
Measurements
Most manufacturers are offering hex keys in both metric and imperial measurements. So you need to make sure at the time of ordering that the measurement system is rightly selected. The actual size is the same, and only the measurement markings are different on the keys.
Quality
Almost all of the hex wrench sets are made of steel, but there is a massive difference in steel quality. 8650 steel is the most commonly used in tools such as hex keys. Many best hex key sets are made out of chrome vanadium steel because it offers unmatched resistance against wear and tear, giving the hex key a long life. Chromium, when added in more quantities, can make the steel stainless. The manufacturers may not specify the type of steel, so you should choose stainless steel to be safe.
Tips for buying the best hex key set and its maintenance
1. Consider your intended use and storage space available before purchasing a hex key set. If you want to keep a set in the car, then a T-shaped hex key set with a holder is not ideal since it will occupy the scarce storage space in the car. A folding hex key set is a much better option for your vehicle.
2. Always clean the hex keys when you are done using them before putting them back in the case. Clean hex keys will protect themselves against the possible carbon build-up and risk of rusting over time. Also, your hex keys will look new and shiny for your subsequent use.
3. If the edges are rounded after extended use, you can try using the other end of the same key or sharpen it. You can also trim off the damaged end of the hex key using a power tool.
Best hex key sets FAQ.
Q: How to select the best Allen keys for bikes?
A: Since there is very little, if any, storage available on bicycles, you should always select the folding hex key set for your bike. You will primarily be using this set on one bicycle; make sure that the measurements on the hex key set match with the ones on your bike.
Q: How to select the best hex key set for electricians?
A: A set of 30 pieces should be selected by electricians to cover all hex head bolt size ranges. The second most crucial factor is portability, and a set that comes in a box rather than a case is an automatic choice. Some electricians recommend color-coded hex keys, but in our opinion, it is a personal choice.
Q: Why do some hex keys have a ball end?
A: The ball end makes the insertion easier. The ball enters the socket first and allows an angle to fit into the socket gradually compared to the flat end hex key, where you have to be more cautious. This little bit of extra guidance can increase the life of the hex keys even more since the exposure of edges during the fit-in process is reduced.