8 Most Common Mistakes When Choosing a Folding Knife (and How to Avoid Them)

Choosing a folding knife today is not difficult. The selection is vast, with quality models available at almost every price point. Yet many buyers make the same mistakes: they focus on specifications that have little relevance to their intended use, overlook ergonomics or fall for marketing claims. The result is a knife that may look great but fails to meet expectations in everyday use. This article covers the most common mistakes when choosing a folding knife and explains how to avoid them.

If you are unfamiliar with the basic terminology or just starting to choose your first folder, we recommend reading our previous article, How to Choose a Folding Knife. It explains the different construction types, materials, locking mechanisms, blade grinds and opening methods in detail. This follow-up focuses on practical advice and the most common mistakes that can lead to unnecessary disappointment with a new knife.

When choosing a folding knife, do not focus solely on its appearance or blade steel. Ergonomics, ease of operation and overall build quality are equally important. Photo: Rigad

1️⃣ Choosing a Folding Knife Based on Looks

Design is often the first thing we notice about a knife. Bright handle scales, a black DLC blade coating or a titanium handle can immediately catch the eye. None of these features, however, tells you how well the knife will perform in actual use.

Ergonomics matter far more. Consider how the knife fits your hand, whether the grip remains secure when wet, whether the handle edges create pressure points and whether you can comfortably reach the lock and operate the opening mechanism with one hand. You will notice these qualities every time you use the knife, while an attractive finish will eventually lose its novelty.

That does not mean appearance should play no role at all. If you are choosing between two comparable models, design can certainly be the deciding factor. It just should not be the main reason for buying a knife. A folding knife is first and foremost a working tool, and function should always take priority over appearance.

2️⃣ Relying Solely on the Type of Steel

Blade steel is one of the main specifications buyers compare when choosing a knife. It is therefore common to assume that a blade made from CPM S35VN or MagnaCut is automatically better than one made from a more conventional steel. In reality, the name of the steel alone does not determine the overall quality of the knife.

Heat treatment is just as important. Even a premium powder metallurgy steel can perform worse than a properly treated conventional steel if it has been poorly hardened or tempered. Blade geometry also plays a major role, including blade thickness, grind and edge angle. These factors often have a greater effect on actual cutting performance and edge retention.

When choosing an EDC knife, do not be swayed by the materials list alone. User experience, the manufacturer’s reputation and the knife’s overall build quality are much better indicators. In most cases, a well-designed knife made from an average steel will serve you better than a poorly executed model using the latest high-end material.

The size, handle shape and lock operation all have a major impact on how comfortably and safely you can use a folding knife. Photo: Rigad

3️⃣ Overlooking Ergonomics

If you have the opportunity to handle a knife before buying it, take advantage of it. Photos and technical specifications cannot tell you how well the knife will fit your hand.

Focus on several practical points:

• How the knife fits your hand. The handle should remain comfortable even during a firm grip and should not create unnecessary pressure points.

• Lock and opening mechanism. Make sure you can easily open and close the knife with one hand and comfortably reach all controls.

• Use with gloves. If you plan to use the knife at work, on the range or outdoors, make sure you can operate it safely while wearing gloves.

• Grip security. The handle scales should provide sufficient traction even when wet or used with sweaty hands. An overly smooth handle may slip during use.

• Knife balance. The knife should feel natural in the hand without being noticeably blade-heavy or handle-heavy. Good balance makes handling more precise and comfortable.

You may think ergonomics do not matter if you rarely use your knife. But with regular use, a well-designed handle, secure grip and intuitive controls make a significant difference.

4️⃣ Choosing the Wrong Size

There is no universally correct size for a folding knife. A model that works well for everyday carry may not be the best choice for multi-day outdoor trips. Conversely, a robust outdoor knife may prove unnecessarily bulky for everyday EDC.

Consider the following:

• Size relative to intended use. A compact model is usually sufficient for routine EDC tasks. More demanding outdoor work generally calls for a longer, more robust blade.

• Carry size and weight. A large or heavy knife may become uncomfortable in your pocket, while an overly small model may not be practical for extended use.

The ideal size is therefore not just a matter of dimensions. It is a compromise between what you expect from the knife and what you are willing to carry every day.

A quality folding knife can last for many years. Regular maintenance helps preserve its performance and reliable operation. Photo: Rigad

5️⃣ Cutting Corners in the Wrong Places

A less expensive folding knife is not necessarily a bad one. Today, many reputable manufacturers offer affordable models with reliable construction and solid build quality. However, caution is warranted with extremely cheap knives of unknown origin, where compromises often become apparent after only a few uses.

Pay particular attention to construction details that affect both safety and service life:

• Lock. It should operate smoothly and reliably, securing the blade firmly in the open position.

• Construction and hardware. Poor-quality screws or soft materials can wear quickly or work loose.

• Blade play. A well-made knife should have no noticeable side-to-side or vertical blade play when open.

A higher price does not automatically guarantee a better knife. At the same time, a suspiciously low price often means compromises in exactly the areas where you do not want them.

6️⃣ Using a Folding Knife Beyond Its Limits

Even the highest-quality folding knife is not designed for every task. Its construction is intended primarily for cutting. Using it for jobs it was not designed to handle risks damaging the knife and injuring the user.

The most common examples include:

• Prying. Neither the blade nor the lock is designed to serve as a pry bar. Prying can damage the blade, create play in the pivot or cause the lock to fail.

• Batoning. Striking the spine to split wood is better left to fixed-blade knives. With a folder, it places unnecessary stress on the pivot and locking mechanism.

• Using it as a screwdriver or chisel. A folding knife is no substitute for proper tools. Any use outside its intended purpose increases the risk of damage.

If you expect a knife to withstand rough use, a fixed-blade model or a purpose-built tool will be the better choice.

💡 TIP: Need a tool that combines a blade with screwdrivers, pliers or a saw? Read our article How to Choose a Multitool, which explains what to consider when selecting a multi-purpose tool for EDC, outdoor use or work.

A folding knife is designed primarily for cutting. Prying, chopping and other forms of improper use place unnecessary stress on the blade and mechanism. Photo: Rigad

7️⃣ Neglecting Maintenance

No quality folding knife will continue to operate reliably forever without basic care. The good news is that regular maintenance takes only a few minutes and can significantly extend the knife’s service life.

Follow a few simple rules:

• Clean the knife regularly. Dust, dirt and material residue can enter the mechanism and interfere with smooth blade operation.

• Lubricate the pivot and lock occasionally. A drop of suitable oil helps maintain smooth opening and reliable operation of the mechanism.

• Wash and dry the knife after contact with food or moisture. This helps prevent dirt buildup and unnecessary corrosion.

• Check the screws. Some fasteners may gradually work loose with regular use.

Regular maintenance helps preserve smooth operation, reliable lock function and the knife’s overall service life. Without it, performance will gradually deteriorate.

8️⃣ Ignoring Knife Laws

Knife laws in the Czech Republic are relatively permissive. However, the situation may be very different when travelling abroad. Some countries restrict blade length, while others regulate opening mechanisms or specific types of knives.

Before travelling, always check local laws, especially if you carry:

• Automatic knives. These are restricted or prohibited in some countries.

• One-handed opening knives. These are not permitted without restrictions everywhere either.

• Larger folding knives. Some countries regulate maximum blade length or how knives may be carried in public.

Problems may arise not only during a routine inspection. Different rules may also apply when travelling by air or entering certain public buildings and events.

A few minutes spent checking local regulations can save you unnecessary trouble.

Choosing a Folding Knife: Quick Checklist

Before deciding on a specific model, review this short checklist:

✅ I know what I will use the knife for most often.
✅ I have chosen a size that I will actually carry.
✅ I consider the knife’s overall quality, not just the name of the steel.
✅ If possible, I handle the knife before buying it.
✅ I understand that a folding knife is not a universal tool for every task.
✅ I will not neglect regular maintenance.
✅ If I travel abroad, I check the local knife laws.

A Good Knife Is One You Will Actually Carry

The best folding knife is not necessarily the most expensive model or the one made from the most exotic steel. It is a knife that meets your needs, feels good in use and becomes a natural part of your gear. By avoiding the most common mistakes in selection and use, you will gain a reliable tool that can serve you for many years.