I've recently been pondering EDC Blades a lot. I am in the 'lucky' position that I find myself mostly in countries where some restrictions apply; like the UK and Germany. German laws prohibit Blades that are OHO AND locking, one of them is fine, while the UK allow blades under three inches that won't lock. I have a thing for smaller, not too aggressive or tactical blades anyhow, so I never worry about the three inches. But the fact that I can't have a locking and OHO blade limits my choices significantly. After one of my EDC choices disappeared from my checked luggage during a flight within Asia, I was in the market for a replacement and came into a shopping frenzy, leaving me with a choice of blades in different configurations. I tried to keep an open mind and used several different knives for longer periods of time to see how well they performed once I got used to them. After that period passed, I tried to sort out my thoughts on the different styles to formulate my personal preferences. Here's what I came up with: Laws & Legality: I have owned blades of the restricted kind, since only carrying them without due cause is prohibited. You could say that I'm on good terms with law enforcement and that it is quite unlikely that I have to expect to be strip searched by the police. But that also means that when that happens, the officer doing the searching must already bear some kind of grudge against me, be it justified or not, and it's best not to give him reasons to enforce further laws on me by carrying a knife that is prohibited. Opening & Locking: Since I can't have locking&OHO, I used locking THO, non locking OHO and non locking THO. What I found was this: OHO is a huge feature for me. The little blade in my trouser pocket is the one that comes out for cutting pieces of rope/string, ends of all kind of things that stick out, opening letters, and parcels. I find myself in a situation where I'm already holding the to-be-cut object in one hand more often than anticipated. OHO is very handy then, because I can apply the blade to the object in one swift movement, the blade coming out on the way from my pocket to the object. Putting down the object to get out the knife and deploying the blade somehow defeats my idea of having an EDC blade in those scenarios - I could be looking for a sharp object in close proximity instead. I ended up selling all knives without the OHO option but one. I've also used a non locking flipper for a very short period of time but judged that blade too dangerous for EDC. The OHO must have a slipjoint or something similar to prevent opening in the pocket. Size & Weight: This came a bit as a surprise, but weight actually does not really matter to me. It might be more of a factor once the blade length exceeds three inches, but for the small knives I use, I did not care at all if they were considered light or heavy. I could carry a 4oz knife just as well as a 1,7oz one and the difference did not bother me at all. The size is more of a factor. My size 10 Hands demand a knife big enough for a firm grip while my tight pockets demand a size that does not bulge and therefore advertise me as a knife carrier. A well executed deep carry clip can make all the difference between a knife that is too large to fit into the FR jeans pocket without bulging and one that sits there just fine. Since the knife spends the majority of its time with me inside my pocket, this is a factor that I'd have totally underestimated at first glance. The act of retrieving it from its place upon my person and putting it back there after use is at least just as important as the act of unfolding the blade, if not more so. A knife that fits my hand like a glove, has a superb blade and perfect OHO will nonetheless quickly drop out of my EDC rotation when it does not do a good job sitting in my pocket. Blade Steel & Cost: Starting from cheap Chinese 8CR13MOV, I've used lots of medium ranked steels like 420, 440c, D2 through better N690CO all the way up to S90V. The Chinese ones were a bit frustrating because their edge retention was miserable. I've gone through the pains of bringing a Byrd Tern all the way to a mirror edge only to find that two days of normal EDC usage took the razor sharpness off and a quick topping up with a medium and fine stone ruined the finish. I clearly draw the line when I spend more time sharpening a blade than using it. Better steel obviously makes a better knife, but also, usually a more expensive one. I find myself among the unlucky 95% of the world population that actually have to work to keep up the worn in habits of sleeping under a roof, eating multiple meals each day and staying hydrated. I'm not very likely to use a $200+ knife and a hammer to chisel down masonry because I'm too lazy to go to the garage and retrieve the actual chisel. The more expensive a knife gets, the more hesitant I get using it for tasks that put a lot of wear on it. In addition to that, I try and estimate how high the probability of coming home without the knife I pocketed might be - be it caused by loss, theft, carelessness or whatnot. Vanity might be a factor as well: When you can either use a plain ol' blade or a nice one, I prefer nice. I like the choice of having at least one knife that did not set me back by hundreds of bucks and can be replaced without shedding tears, but I'd like that to have at least D2/440c quality. If I was to have only one single knife, I'd rather pick a medium quality one than a handmade piece of pocket bling I can't bring myself to use properly for fear of ruining the pristine finish. Impact On Others & Office Compatibility: Needless to say that using a karambit in the office to open letters will raise eyebrows. Interestingly, I found that the quickness of the blade deployment plays a big factor in how dangerous and/or threatening people judge a knife. A knife with two handed opening will raise less suspicion even if it was bigger and more of a useful asset in a knife fight than a smaller OHO knife that unfolds in the blink of an eye. A black blade and camo handle also speak volumes. The more gentlemanly a knife comes across, the more likely the carrier is considered eccentric rather than a possible thread by people who do not really get down with the idea of others having a knife in their pocket. In conclusion, the knife that is the best fit for my personal EDC needs to pass the following criteria, sorted by importance: -both UK and Germany legal -has a deep carry clip and/or jeans-pocket-convenient dimensions -has one hand opening -sits in the medium price bracket, with at least halfway decent steel. -does its best not to scare the squeamish or easily offended I was surprised about how little I cared whether a knife was lightweight or not and even more surprised to find out how important it is to me how well it rides my jeans pocket. So these are my thoughts on how my EDC knife has to be. What are yours?