Best Assisted Opening Knives In 2021 [Updated Review]

The entire base of an assisted opening knife is convenient and speedy. Assisted knives were introduced to the market to give knife enthusiasts a knife that was quick to deploy, safe to handle, and most importantly – legal in the United States

Before we get into the actual topic, lemme introduce myself!

In this article, We have listed the best assisted opening knives that deliver performance; these knives are simply the best for their price and quality. (I tested 44 knives to come up with this heavenly list for you!)

These assisted knives offer a quick and convenient way to handle your everyday tasks or chores. I’ve kept the article short but very interesting and informative so that it doesn’t bore you. I recommend you reading this article completely to make a better purchase.

Top 10 Best Assisted Opening Knives Review

1. Kershaw Cryo II

Best Assisted Opening Knives

Kershaw is a giant in the knife industry. The quality and variety they bring to the table for knife enthusiasts are commendable. Kershaw Cryo II is our first pick for the spring-assisted knife. If you’re tight on the budget, then look no further, grab the Kershaw Cryo 2.

Specifications of the Kershaw Cryo II​

  • Country of Origin: China​
  • Blade length: 3.25 inches
  • Closed length: 4.4 inches
  • Overall length: 7.75 inches
  • Blade Material: 14C28N stainless steel
  • Locking Mechanism: SpeedSafe assisted opening
  • Handle Material: 410, titanium carbo-nitride coating

The assisted action of Cryo II is as smooth as butter, perfectly solid lock up, nicely ground blade that doesn’t require frequent sharpening & has a great deep carry clip. The handle is simple and feels good in the hands, but it makes an average grip.

It’s a decent knife with the best value for the money. And, Kershaw Cryo II weighs a little heavy and needs work on the handle to make a better grip but for the price point, it does the justice. It’s also our best folding knife of the years 2020 and 2021.

2. Kershaw Ken Onion Leek

Best Assisted Opening Knives

​Kershaw Ken Onion Leek is an ideal size EDC assisted knife with 3 inches blade. Its design is very slim and sleek. Unlike Kershaw Cryo  II, it is built in the USA. The drop point blade design makes it compatible for the detailed work.

​Specifications for the Ken Onion Blur

  • Country of Origin: USA
  • ​Blade length: 3 inches
  • Closed length: 4 inches
  • Overall length: 7 inches
  • Locking Mechanism: SpeedSafe assisted opening
  • Blade Material: Sandvik 14C28N, bead-blasted finish
  • Handle Material: 4410 stainless steel, bead-blasted finish

The Kershaw Leek is razor-sharp out of the box. The assist function operates well but takes a little bit to get used to. The reversible pocket clip makes it convenient for everyone. The stainless steel, size, and all other attributes make it a great knife overall.

​The assist function is a little bit tricky. If the lock is left off, the opening mechanism will act like a switchblade blade which might get you in trouble because it will open faster than your expectation so you might end up getting a cut on your finger.

3. Kershaw Ken Onion Blur

Best Assisted Opening Knives

​Kershaw Ken Onion Blur is a multitasking knife because of its blade’s design. The blade is slightly curved at the drop point which makes it compatible for slicing and piercing at the same time. Kershaw Ken Onion Blur comes with a plain edge and serrated edge (both prices are different).

​Specifications of The Kershaw Ken Onion Blur

  • Country of Origin: USA
  • ​Blade length: 3-3/8 inches
  • Closed length: 4-1/2 inches
  • Overall length: 7-7/8 inches
  • Blade Material: Sandvik 14C28N, DLC coating
  • Locking Mechanism: SpeedSafe assisted opening
  • Handle Material: 6061-T6 anodized aluminum, Trac-Tec inserts

Kershaw Ken Onion Blur has two blade versions, serrated edge assisted knife and plain edge assisted knife. Blur has a very sharp blade, and the handle makes the right amount of traction, unlike Ken Onion Blur. Edge retention is incredible and assisted opening mechanism is incredibly smooth.

​Overall, I love Ken onion blur, but one thing people and I hate about Ken Onion Blur is the pocket clip. It’s not tight; you might have to tighten it up frequently. I would recommend carrying Blur in the front pocket  because of the clip.

4. SOG Aegis AE02-CP

Best Assisted Opening Knives

​SOG Aegis AE02-CP is a small spring-assisted knife constructed with a straight-edge blade. If you don’t like Kershaw, for whatever reason, then SOG in another reliable and popular knife brand that you can opt for.

​Specification of The SOG Aegis AE02-CP

  • Assembling: USA
  • Blade length: 3.5 inches
  • Closed length: 4.75 inches
  • Overall length: 8.25 inches
  • Blade Material: AUS-8 stainless steel
  • Handle Material: Glass-Reinforced Nylon
  • Locking Mechanism: SpeedSafe assisted opening

Despite being small and light, the build quality is appreciable. It opens quickly and smoothly, I’m using it for a year now, and the spring-assisted still works fine. The blade is sharp and built of quality AUS-8 stainless steel which can cut through fish, apples, and boxes like a cake.

I liked the opening mechanism, but I always have issues folding the blade because of the arc lock. Arc lock needs an extra push to fold the blade completely. Overall, its value for the money (comes with lifetime warranty)​

5. SOG Flash II

Best Assisted Opening Knives

SOG Flash is an inexpensive knife. SOG Flash II is a bang for the bucks with attributes like lightweight, excellent ergonomics, and a spring opening mechanism. If you’re tight on the budget, then look no further other than SOG Flash II.

Specification of The SOG Flash II

  • Assembling: USA
  • Blade length: 3.5 inches
  • Overall length: 8 inches
  • Closed length: 4.5 inches
  • Blade Material: AUS-8 Stainless Steel
  • ​Handle Material: Glass-Reinforced Nylon
  • Locking Mechanism: SpeedSafe assisted opening

SOG flash is a cheap assisted opening knife with decent quality. The steel and the blade is definitely not comparable to the top models, but it does the job nicely for regular everyday chores like cutting rope, slicing through vegetables, and opening boxes.

The SOG Flash II’s blade is fragile as compared to other models; you can’t use it for heavy-duty tasks. Although the handle is constructed of nylon, it still feels good in hands (no plastic feeling) and also makes it very durable in the long-term.​

6. Gerber Covert Knife

Best Assisted Opening Knives

The Gerber Covert is Backed by the speed of F.A.S.T technology, which is used for quick one-hand opening deployment of the titanium-coated blade and G-10 handles that give you a tacky grip (G-10 is my favorite material for handle).

Specification of the Gerber Covert

  • Assembling: USA
  • Blade length: 3.70 inches
  • Closed length: 5 inches
  • Overall length: 8.70 inches
  • Handle Material: G-10
  • Blade Material: Titanium-Coated Blade
  • Locking Mechanism: One-hand assisted opening/ F.A.S.T. Technology (Forward Action Spring Technology)

If you need a serious one-hand assisted opening knife, then Gerber Covert is what I would recommend to you. It is extremely fast and reliable as compared to the models mentioned above. The handle is constructed of a G-10 material which provides a solid grip and a nice ergonomic feel.

Gerber Covert is a little heavy. The Gerber covert has a lock button that has to be deactivated before opening or closing the blade which sometimes feels annoying when you’ve to do it every single time. For the price point, it justifies everything.​

7. Smith & Wesson SWMP4L

Best Assisted Opening Knives

​The Smith & Wesson SWMP4L is a large assisted knife built for military and police, i.e., tactical work. This knife is big and bulky and can be used to break the window of a car. If you need a knife for medium-duty tasks, then this knife is what I would recommend to you.

​Specification of the Smith & Wesson SWMP4L

  • Made in Taiwan
  • Blade length: 3.6 inches
  • Closed length: 5.0 inches
  • Overall length: 8.6 inches
  • Blade Material: 4034 Stainless Steel
  • Locking Mechanism: M.A.G.I.C. Assisted Opening Liner Lock
  • Handle Material: Black Aluminum Handle with Black Rubber Inlay​

SWMP4L is a part of the M&P (Military and Police) series; therefore, making it a combat knife. It features a glass breaker tip. The blade comes sharp and retains the edge for a good time. It can be used for small and medium heavyweight tasks. The opening mechanism is just MAGIC. This knife is super durable which makes it more convenient to be on this list.

The indent in the clip is short and deep which makes drawing and re-clipping a hassle. The other problem might be the overall size and bulkiness which kinda takes it off from the everyday carry selection.​

8. Zero Tolerance ZT0350TS

Best Assisted Opening Knives

​Zero Tolerance has to be in my list, undoubtedly. ZT0350TS is a plain edge assisted knife, and the updated version of Zero Tolerance ZT0350TS is 10% smaller and lighter than the original; non-serrated blade with Tiger Stripe finish (I’ve purchase it; currently testing it).

Specifications of the Zero Tolerance ZT0350TS​

  • Country of Origin: USA
  • Blade length: 3.25 inches
  • Closed length: 4.625 inches
  • Overall length: 7.76 inches
  • ​Locking Mechanism: SpeedSafe manual assist
  • Handle Material: textured matte black G-10 handle
  • Blade Material: S30V stainless-steel with Tungsten DLC coating

If you need a high-end assisted knife as a pocket or EDC knife then this knife is what you need. This knife has a razor-sharp blade; great finish which makes it durable against scrapes and its wears nice. The flipper lets you open the knife with one hand smoothly. The handle is consists of a G-10 which will give you a very nice grip and ergonomic feel.

It’s a little hard to sharpen the blade as compared to other blades unless you’re a very experienced sharpener. The spring wears out with time, for me, but the limited lifetime manufacturer’s warranty saved me.​ The newer version is still in testing and so far everything is good.

9. Alpha Tek Spring Assisted

Best Assisted Opening Knives

The spring-assisted knife is a unique pocket knife because it comes with a bottle opener drop point blade. I’m not really sure how would you react to it, but I’ve it in my collection, and I used it for like six months regularly and still use it. If your work includes bottle opening, then this knife is for you.

Specifications of the Alpha Tek Spring Assisted

  • Country of Origin: USA
  • ​Blade length: 3.38 inches
  • Closed length: 5 inches
  • Overall length: unknown
  • Locking Mechanism: Spring Assisted
  • Handle Material: G-10 handle
  • Blade Material: 440C High Carbon Steel

The blade is tough, and the knife feels sturdy. Spring-assisted works great, blade opens very smoothly. The blade design is constructed in a way that people can open the cap of the bottle, and it works both ways, i.e., opened and closed.

Since it’s a high carbon steel knife, therefore it will rust quickly, but if you live in the hot climate, then it shouldn’t bother you. The other downside is the serration, serrations tear and don’t cut.​ By the way, you can check here the list of carbon steel pocket knives.

10. Kershaw 1990X Brawler

Best Assisted Opening Knives

​If your budget is little to no, then Kershaw 1990X Brawler is my top pick for you. I know you can find more models for the low price but believe me the spring will come out quickly and those knives will be very fragile.

Specifications of the ​Kershaw 1990X Brawler

  • Country of Origin: USA
  • Blade length: 3 inches
  • Closed length: 4.1 inches
  • Overall length: 7.1 inches
  • Handle Material: Glass-filled nylon
  • ​Locking Mechanism: SpeedSafe assisted opening
  • Blade Material: 8Cr13MoV with black oxide coating

Kershaw 1990x would be the right choice if your budget is meager and you won’t be using it on a daily basis. The knife is very built; everything is screwed tightly and correctly. It makes a decent grip for people with small hands so you can consider it more of a female pocket knife.

​Everything about this knife is decent, don’t expect much. The assisted opening works great, but it is quite fragile. The blade is sharp, but it will rest quickly because of 8Cr13MoV steel.

Standard features of Assisted opening knives

Thumb stud or blade button – these implements allow for fast, one-handed opening of assisted knives and are used to begin the blade opening process. A spring or lever is then automatically engaged to complete the blade’s travel through the full opening arc. Thumb studs make knife opening quite simple, while blade buttons accomplish the same process via a slightly different hand motion.

​A variety of blade designs – Assisted knives are varied in their blade offerings. If you’re looking for an assisted knife to use as an everyday carry option (EDC), a semi-serrated model with a drop point or clip point blade may serve you well. Those with more specific needs may want to investigate available blade options like rescue/safety blades, full serrated options, dagger point, utility blades, or Tanto options.

​Lightweight construction – Those knives are usually designed to be deployed quickly and complete everyday tasks with ease. Essentially these knives are not constructed for heavy chores like you’d experience during a camping trip, but they are perfect for cutting rope, opening packages, and appropriate defensive maneuvers.

2 Important Things to Find Best Assisted Opening Knife

Durability: This is the important aspect to consider before you make a purchase. The durability of the knife is measured by how well it performs or maintains its quality over time after being used for a long time.

All the blades we mentioned above have excellent durability power because these blades are made up of quality steel. These blades will work for a long time and will not damage quickly. These blades used for best assisted knives are super durable. Remember, exception is always there. I’ve listed the downside of each knife so if you like a knife then read my views about it.

Size: Well, size always varies from person to person. Few people have got small hands and few big. But, the size for best assisted opening knives is usually around 3 inches. The knives I mentioned above is listed for everyone. So, there is something for everyone.

Wrapping it Up!

I hope that you found a knife for yourself. If you want me to mention any knife then drop a comment below. And, if you have any questions then feel free to comment, I’ll reply as soon as possible.