So, you just bought yourself a shiny new knife and want to make sure it’s up to snuff. In this article I’ll describe the 6 points that I check when receiving a knife. These characteristics cover the bulk of what decides where a knife lands on the spectrum from abysmally terrible to mythically epic.
#1 Edge Exposure
Checking for edge exposure, most commonly in the form of a proud tip, is one of the first things I do when inspecting a knife. This is because it is a practical concern; if the edge is exposed you can accidentally cut yourself when reaching in your pocket for the knife etc. Most commonly on slipjoints, but also sometimes on modern knives, this issue rears its ugly head as a proud tip. A tip is proud when it sits above the blade well enough that it can be caught on a fingernail without actually opening the blade. This issue is all too common in my opinion, and those who watch my videos know I am hounded by proud tips on otherwise perfect GECs. Modern knives can also have proud tips, but I find it to be quite uncommon. However, modern knives, often having pass through handles (no backspring / a gap at the spine side of the blade well also), can sometimes have edge exposure along that spine side of the handle. This happens when the blade is too tall for the blade well and the edge sits close enough to the back of the handle that you can contact it when running a finger along the back of the handle. Both of these types of edge exposure have their fixes; a proud tip can often be alleviated by dropping the kick, and the edge can be sharpened back from the handle opening. However, I prefer not to have to modify my knives for them to be safe (even if actual injury is unlikely) so these issues are sometimes deal breakers.
#2 Edge Damage
Edge damage on a new knife is most commonly caused by blade rap, but can also be a defect in sharpening. Blade rap is when the edge hits some part of the handle upon closing. On slipjoints the edge often hits the backspring, especially at the spring pin hump, and on modern knives the edge sometimes hits the backspacer or a standoff. I would also consider the edge hitting the sides of the blade well blade rap, but that is covered more in depth by the next point. The edge hitting the backspring can cause varying levels of damage to the edge, from a barely perceptible flat area to a full on roll. No matter the amount of damage done, blade rap diminishes the utility of the knife and is a defect. That said, note that some traditional knife patterns, notably from France, are designed to have the edge rest on the backspring so as to eliminate the tip becoming proud through multiple sharpenings. Less commonly, some knives might come with edge damage not related to blade rap. This type of edge damage can be due to a poor sharpening job from the factory or from damage in shipping. As a knife’s purpose is to cut, the edge should arrive to the buyer without damage.
#3 Blade Centering
The title pretty much says it all here; is the blade centered in the blade well? Some people put a lot of emphasis on this point because they strongly prefer the aesthetics of a centered blade, which is fine if that matters to you. However, an uncentered blade can be indicative of other issues such as blade play (discussed in the next point), a bent or unevenly ground blade, or a warped handle. Those are more practical issues rather than aesthetic. Of course, if a blade is so off centered that it rubs on the handle liners or actually hits the edge on the liner upon closing that is a definite defect. The blade should not be defaced or the edge damaged every time the knife is closed.
#4 Lockup
Most modern folding knives lock, and the lock should function securely when received. The lock should hold the blade open without significant play, or movement, in any direction (for most lock types). You can test for blade play by opening the knife then grasping the blade from the spine side, being careful to keep your hand far from the edge, and try to wiggle the blade side to side and forward and back. Another test that many do is a spine whack test. A spine whack test is when you strike the spine of the locked blade against a hard surface, such as a piece of wood, to check that it doesn’t unlock. Many manufacturers discourage this test, and it is a test that should be done with the utmost care and emphasis on safety (NEVER hold the knife so your hand is in the way of the blade if it did fold) if done at all. Of course, non locking knives can’t be tested for lockup but you can still test for side to side blade play. Having secure lock up is an important aspect of a good knife, as poor lockup can range from irritating to downright dangerous.
#5 Action
Action is the term used for the actual opening and closing of a knife. Folding knife action has come a long way in the last decade or two. Now even extremely budget friendly knives often come with glassy smooth opening and closing. Many knives have ball bearing washers in their pivots which allow for very low friction. Some look for “drop closed smooth” meaning that the blade drops closed by its own weight when unlocked, while others prefer a more deliberate closing motion be required. What an ideal action looks like is up to each individual, but I think a knife’s action should both work practically and be enjoyable.
#6 Fit and Finish
Finally, the knife should be inspected for general fit and finish. So what is fit and finish? It’s the sum of how precisely the parts of the knife are fit together and how well each part is finished. This could include the meeting of the scales, or covers, of the handle with the bolsters or with the liners. It could include the evenness of the finish on the handle and blade; the lack or presence of machining marks etc. Fit and finish is another area where budget knives have made huge strides to close the gap with premium knives over the last few years. Most modern knives of $50 and up should have few if any obvious imperfections in the fitment of the parts and finish of the surfaces upon a cursory glance. That said, some knives are expected to have slight imperfections due to the nature of their manufacture. For example, many traditional slipjoint knives are expected to have minor flaws and individual character because they’re made using traditional methods. Even Great Eastern Cutlery, the premier American traditional knife manufacturer, knives are expected to have a slight deformation in a pin or gap around the shield every now and then. Ultimately, the level of fit and finish that one finds acceptable at each price point is a personal decision, but it is still worth considering.
BONUS; First Impression
There’s another characteristic of a knife that I think is worth considering but that didn’t make the list; the visceral first impression it gives you. Often, as a knife enthusiast, opening a knife and handling it for the first time will give you a strong feeling. Whether positive or negative, this feeling often has nothing to do with the objective qualities of the knife outlined above. Even though this first impression might not be based on any real practical characteristics, it’s still important to one’s enjoyment of a knife. We as knife enthusiasts deserve to be thrilled every time we get a new knife, so don’t ignore your first impression of a new purchase.
For those of us who make knives a hobby, we deserve to get a good value for our hard earned money. That’s why I think it’s important to check each knife you receive for these 6 key points of quality, and also to consider your first impression. If a knife passes all these checks, congratulations; you have yourself a great every day carry tool or collection piece in your new knife!
P.s. I used videos that touch heavily on the discussed characteristic here in lieu of pictures because I think they do a better job of showing the issue in a realistic manner.
