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SOG SlimJim Folding Pocket Knife- SOG Assisted Technology w/ Tactile Bumps and Cutout Aid, Reversible Carry Clip, AUS-8 Stainless Steel Body (SJ31-CP), One Size, Hardcase Black

4.1 4.1 out of 5 stars 859 ratings

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About this item

  • SLIMMEST ASSISTED OPENING KNIFE ON EARTH: The SlimJim compact knife is a super-thin clip pocket knife, backpacking knife and camping knife; measures 4.22 inches closed and .25 inches thick (without removable clip); model number: SJ31-CP
  • 3.18 INCH AUS-8 MINI KNIFE: An industrial knife tool with surprises; a formidable small EDC knife, fishing knife, shipping knife and survival knife, if push comes to shove; carries easy at 2.4 ounces
  • EVERYDAY CARRY KNIFE W/ LOCKBACK: This lightweight every day pocket knife includes SOG Assisted Tech (S.A.T.); these utility knives and rescue knives open one-handed, Lockback secures the blade
  • 420 STAINLESS STEEL KNIFE HANDLE: SOG outdoor survival knives, camping knives and hunting knives are of the highest quality; even the SlimJim handle is stainless steel
  • SOG CARE: SOG knives and tools are built to last but may require initial tuning adjustments along with regular cleaning, lubrication and sharpening; we consider all repair and replacement requests
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Customer ratings by feature

Light weight
4.4 4.4
Sturdiness
3.7 3.7
Value for money
3.3 3.3

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From the manufacturer


SAFETY FIRST: A Lockback keeps the blade open, and a reversible clip puts it in easy reach of either hand.

Field Notes:

"The SlimJim is one scary everyday carry."

Best features:

  • Ultra-compact assisted open
  • Super lightweight design
  • Stainless steel inside and out

A Knife About Two Quarters Thick

Easy Carry + Deploys Quick

Trust the SOG SlimJim assisted opening knife to give you the edge when an edge is all you have room to carry. SOG, based in Seattle, WA, created this knife to be the slimmest assisted opening knife – and it is.

  • “CALL ME SLIM”: The slimmest assisted folding knife in the world houses a .08” thick clip-point blade in a .25” handle at its widest point
  • STAINLESS STEEL X 2: The SlimJim’s satin-polish AUS-8 stainless steel blade is housed in a bead-blasted 420 stainless steel handle
  • UPGRADED S.A.T. TECH: SOG’s Assisted Technology was reengineered and improved to propel its most streamlined blade
  • 2 SAFETY LOCKS: The Lockback and slide lock keep the blade open or closed, while extra jimping and handle ridges improve grip
  • SOG COMMITMENT: Take care of your knives and we’ll take care of you; SOG tools are built to last, and we’re committed to making sure they do

BORN + BASED IN THE USA

SOG STRONG. SOG, short for MACV-SOG, is a U.S. tool and knife company founded in 1986 and named in honor of the Military Assistance Command, Vietnam - Studies and Observations Group, a spec ops outfit that valued quick, quiet solutions.

SOG SUPPORT. Our knives and tools are built to last, and we always stand ready to assist you when needed.

U.S. DESIGN + QUALITY CONTROL

SOG STEEL. Your SOG SlimJim folding knife is crafted in AUS-8 stainless steel with a 420 stainless steel handle for added durability and all-around protection.

SOG STRAIGHT EDGE. The SlimJim clip point features a tried and true blade design that more finely centers the tip position better balance and sharper piercing cuts.

CONTENTS

  • SOG SlimJim Assisted Opening Knife (SJ31-CP)

spring assisted knife pocket tactical tac folding sog small utility survival open mini cutter blade
SlimJim (SJ31-CP) SlimJim (SJ32-CP) SlimJim (SJ33-CP) SlimJim XL (SJ52-CP)
Customer Reviews
4.1 out of 5 stars
859
3.9 out of 5 stars
446
4.1 out of 5 stars
173
4.2 out of 5 stars
487
Blade Length 3.18” 3.18” 3.18” 4.18"
Closed Length 4.22” 4.22” 4.22” 5.18"
Weight 2.4 oz. 2.4 oz. 2.4 oz. 2.7 oz.
Steel Type AUS-8 AUS-8 AUS-8 AUS-8
Handle Type 420 Stainless Steel 420 Stainless Steel 420 Stainless Steel 420 Stainless Steel
Blade Shape Clip Point Clip Point Tanto Clip Point
Finish Satin Polished Hardcased Black TiNi Satin Polished Hardcased Black TiNi
Assisted Opening Yes Yes Yes Yes

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here. [PDF ]

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SOG

SOG SlimJim Folding Pocket Knife- SOG Assisted Technology w/ Tactile Bumps and Cutout Aid, Reversible Carry Clip, AUS-8 Stainless Steel Body (SJ31-CP), One Size, Hardcase Black


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Product Description

People say the SlimJim is so light and compact they forget it’s in their pocket … that is, until they need it. And, when they do, a quick flick of the thumb and the world’s slimmest assisted folding knife plays into action. That’s thanks to SOG Assisted Technology (S.A.T.), a system of opposing high-tension coils that propels the blade open instantly once you give it a flick.

Important information

Legal Disclaimer

This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Customer reviews

4.1 out of 5 stars
4.1 out of 5
859 global ratings

Customers say

Customers like the weight, sharpness, and thickness of the knife. For example, they mention it's light, and easy to carry. That said, some complain about the ease of opening and closing. That being said, opinions are mixed on quality, performance, and ease of use.

AI-generated from the text of customer reviews

87 customers mention87 positive0 negative

Customers find the weight of the knife to be super slim, light, and easy to carry. They also say it's the slimmest assisted opener and the perfect size for tucking in their pocket.

"...It tucks away in a pocket without notice. It is light enough you won't think it's there, but feels weighty and strong in the hand...." Read more

"...It’s jewelry with functionality and some protection. Soooooo light, THIN like nuts, and I wouldn’t want to be cut by the blade...." Read more

"Started off really happy with this knife. Very lightweight and sharp. But it didn't take too long untill it stopped operating correctly...." Read more

"...inch blade may be a bit long for an EDC, but folded this knife is so compact and thin...." Read more

68 customers mention60 positive8 negative

Customers like the sharpness of the tool. They say it's razor sharp out of the box, and is suitable for wire work. Some customers also mention that the knife has a good edge.

"I love this knife. It was very sharp upon arrival, and I have since sharpened it to a razor...." Read more

"Started off really happy with this knife. Very lightweight and sharp. But it didn't take too long untill it stopped operating correctly...." Read more

"...The lockback and assisted opening work great. The blade is also crazy sharp on this thing so b careful...." Read more

"its a good looking knife and its very sharp and light weight, however the blade deployment is very poor...." Read more

54 customers mention42 positive12 negative

Customers like the thickness of the tools. They mention it's super thin, slim, and like nuts.

"...It’s jewelry with functionality and some protection. Soooooo light, THIN like nuts, and I wouldn’t want to be cut by the blade...." Read more

"...However it's a good thin but sturdy blade. No slop in it whatsoever. The lockback and assisted opening work great...." Read more

"...The packaging lured me in. The knife is very thin and therefore, so is the blade. The blade is exceptionally sharp...." Read more

"...This is an awesome knife to carry around every day. It is extremely thin so you can pocket clip it with just about any kind of pants/shorts..." Read more

49 customers mention38 positive11 negative

Customers like the appearance of the knife. They say it looks good, is thin, and the clips are the best designed on the market. Some customers also say that it works and performs perfectly. Overall, most are happy with the appearance and functionality of the tool.

"its a good looking knife and its very sharp and light weight, however the blade deployment is very poor...." Read more

"Can’t say enough about this knife. Absolutely love it. Sleek and easy to carry" Read more

"...The AUS-8 steel should hold an edge well long term and stay shiny (unless you open salt bags with it)...." Read more

"...Truly a gentleman's carry. This beautiful and very sharp blade is amazing, once you start carring a sharp blade with you, you'll wonder how you ever..." Read more

158 customers mention88 positive70 negative

Customers are mixed about the quality of the knife. Some mention it's well made, sturdy, and has decent hardware. However, others say that the blade feels loose when open and locked, the slide lock catches on their pocket, and the pivot, lockback, and sliding safety feel rough.

"...It holds an edge very well, and is responsive to quick touch-ups on the blade.I was initially peeved by the opening mechanism...." Read more

"...You can feel that the the internals--pivot, lockback, and sliding safety feel a bit rough, like they could have been ground and polished better...." Read more

"...It’s jewelry with functionality and some protection. Soooooo light, THIN like nuts, and I wouldn’t want to be cut by the blade...." Read more

"...Despite my user error, this knife is great. It's incredibly slim, and the feeling (or lack thereof) in my pocket is amazing!" Read more

36 customers mention14 positive22 negative

Customers are mixed about the performance of the knife. Some mention that the action works very well, while others say that it does not function properly the majority of the time. The safety pin is unreliable and inconsistent in its function. Overall, opinions are mixed and the knife is not recommended for beginners.

"...But it didn't take too long untill it stopped operating correctly. It frequently doesn't open all the way to locked upon initial operation...." Read more

"...Gun cleaner and lubricants work well. I have never had a knife open so buttery smooth, so consistently, with such a small amount of effort...." Read more

"...None of my other knives have this issue either. It's near useless. That's a shame because I'd really like it of it was functional...." Read more

"...open takes practice to get right, but once you have it down, it works fine...." Read more

29 customers mention10 positive19 negative

Customers are mixed about the ease of use of the knife. Some mention that it is small thin and very simple to use, with no flick or user assistance required. However, others say that it's fairly difficult to deploy the blade, too cumbersome to use and that it can be a problem if in a pinch.

"...knife and its very sharp and light weight, however the blade deployment is very poor. it opens and then bounces back and can potentially hurt you...." Read more

"...on the thumb knob and it locks open immediately, no flick or user assistance is required...." Read more

"...The blade also tends to stick in the handle. Became too cumbersome to use." Read more

"...The stiff opening action also makes it a bit difficult to use when your hands are wet, which is a drag if you have to work in the rain or you're..." Read more

106 customers mention31 positive75 negative

Customers find the knife nearly impossible to open. They say the safety is stiff, and the opening mechanism is not strong. Some customers also mention that the assisted opening only assists part way. Overall, customers are disappointed with the ease of use and functionality of the knife.

"...It frequently doesn't open all the way to locked upon initial operation. Inconvenient at least, to have to open it to locked." Read more

"It is very hard to open, and I CUT MYSELF DOING IT; CLOSING IT WAS ALSO DIFFICULT WITHOUT CUTTING myself. IT IS A TERRIBLE DESIGN." Read more

"...Gun cleaner and lubricants work well. I have never had a knife open so buttery smooth, so consistently, with such a small amount of effort...." Read more

"...Not a very good design. The opening mechanism is not strong. When the blade knob is pushed, the blade opens relatively slowly...." Read more

Excellent EDC Knife, needs a tad more refinement to internals
4 Stars
Excellent EDC Knife, needs a tad more refinement to internals
Overall this is an excellent EDC Knife. The 3.2 inch blade may be a bit long for an EDC, but folded this knife is so compact and thin. I can even clip it to the waistband of my althletic pants and not even feel it's there.I was torn between this an the Twitch II (which I will probably get too) but this has exceeded my expectations overall. The clip point blade looks a bit more menacing than a drop point. However it's a good thin but sturdy blade. No slop in it whatsoever. The lockback and assisted opening work great. The blade is also crazy sharp on this thing so b careful. We'll see over time how long it can hold and edge before sharpening.The lock slider both locks the blade closed and open.Only ding against this is that, out-of-the-box feel is a bit lacking. You can feel that the the internals--pivot, lockback, and sliding safety feel a bit rough, like they could have been ground and polished better. I spent some time breaking it in. Additionally, a applied some light gun oil to the internals which helped the opening/closing, safety, and assisted opening quite a bit.Flicking it open now works near flawlessly, and closing with one hand takes a bit of practice. I found that putting my pinky against the belt clip helps get the leverage to flick it open easily.Overall I'd say this is a great EDC knife. If the factory would smooth and polish the internals more I'd give it 5 stars, but a little break-in time and gun oil lube helped smooth it out. It's a good deal, I'd recommend this.
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Reviewed in the United States on September 30, 2016
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Reviewed in the United States on September 9, 2021
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Reviewed in the United States on January 15, 2023
Reviewed in the United States on May 17, 2021
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4.0 out of 5 stars Excellent EDC Knife, needs a tad more refinement to internals
Reviewed in the United States on May 17, 2021
Overall this is an excellent EDC Knife. The 3.2 inch blade may be a bit long for an EDC, but folded this knife is so compact and thin. I can even clip it to the waistband of my althletic pants and not even feel it's there.

I was torn between this an the Twitch II (which I will probably get too) but this has exceeded my expectations overall. The clip point blade looks a bit more menacing than a drop point. However it's a good thin but sturdy blade. No slop in it whatsoever. The lockback and assisted opening work great. The blade is also crazy sharp on this thing so b careful. We'll see over time how long it can hold and edge before sharpening.

The lock slider both locks the blade closed and open.

Only ding against this is that, out-of-the-box feel is a bit lacking. You can feel that the the internals--pivot, lockback, and sliding safety feel a bit rough, like they could have been ground and polished better. I spent some time breaking it in. Additionally, a applied some light gun oil to the internals which helped the opening/closing, safety, and assisted opening quite a bit.

Flicking it open now works near flawlessly, and closing with one hand takes a bit of practice. I found that putting my pinky against the belt clip helps get the leverage to flick it open easily.

Overall I'd say this is a great EDC knife. If the factory would smooth and polish the internals more I'd give it 5 stars, but a little break-in time and gun oil lube helped smooth it out. It's a good deal, I'd recommend this.
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2 people found this helpful
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Reviewed in the United States on June 3, 2016
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Reviewed in the United States on February 21, 2024
Reviewed in the United States on February 8, 2024
Reviewed in the United States on January 18, 2016
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Cliente de Kindle Kika
5.0 out of 5 stars Buena compra
Reviewed in Spain on February 21, 2016
2 people found this helpful
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