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Kershaw 3820 Injection 3.0 Folding Knife

by Kershaw

List Price: $54.95
Price: $30.16 & FREE Shipping on orders over $35. Details
You Save: $24.79 (45%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Want it tomorrow, April 18? Order within and choose One-Day Shipping at checkout. Details
  • Liner lock; Thumb stud; Reversible pocket clip
  • Steel: 8CR13MOV, bead-blasted finish
  • Handle: 3D-machined G-10
  • Blade length: 3 Inch (7.62 cm); Closed length: 4 Inch (10.2 cm); Overall Length: 7 Inch (17.8 cm)
  • Weight: 3.3 ounces
65 new from $26.73

Frequently Bought Together

Kershaw 3820 Injection 3.0 Folding Knife + Kershaw 3830 Injection 3.5 Pocket Knife + Kershaw Skyline Knife with Textured Black G-10 Handle
Price for all three: $94.98

Buy the selected items together


Product Description

From the Manufacturer

The Injection 3.0 is destined to become your new favorite pocketknife. It offers sleek good looks—from the tip of its classic drop-point blade to its 3D-machined G-10 handle. The Injection is a collaboration between custom knife maker Todd Rexford and Kershaw and we think the results are outstanding. Look for high-end custom details like decorative pivot hardware and machined thumb studs. The G-10 handle has incised cutouts on each side, letting you see through to the stainless steel liners. The G-10 is textured for a secure grip. Even the back spacer offers a custom touch; it's chamfered (cut at an angle) on the back end. Another nice detail is the inset lanyard pin so nothing interrupts the smooth line of the knife. The 3-inch blade is the perfect size for so many day-to-day applications. Built of high-performance 8Cr13MoV, it comes razor-sharp and holds its edge well. The manual opening is smooth and easy. Once open, the blade is secured with a steel locking liner. The pocket clip is reversible for left- or right-handed carry. Manual: There is no mechanical assist, such as Speed Safe, used to open the folding knife. Liner Lock: Locks the blade open during use; one side of the knifes steel "liner," the steel plate to which the handle scales are attached, moves into position behind the blade to securely lock it open. Reversible: Pre-drilled holes in the handle enable the user to change either the tip position or the side on which the knife carries.

Product Description

The Injection 3.0 is destined to become your new favorite pocketknife. It offers sleek good looks—from the tip of its classic drop-point blade to its 3D-machined G-10 handle. The Injection is a collaboration between custom knifemaker Todd Rexford and Kershaw and we think the results are outstanding. Look for high-end custom details like decorative pivot hardware and machined thumbstuds. The G-10 handle has incised cutouts on each side, letting you see through to the stainless steel liners. The G-10 is textured for a secure grip. Even the backspacer offers a custom touch; it's chamfered (cut at an angle) on the back end. Another nice detail is the inset lanyard pin so nothing interrupts the smooth line of the knife. The 3-inch blade is the perfect size for so many day-to-day applications. Built of high-performance 8Cr13MoV, it comes razor-sharp and holds its edge well. The manual opening is smooth and easy. Once open, the blade is secured with a steel locking liner. The pocket clip is reversible for left- or right-handed carry. Manual: There is no mechanical assist, such as SpeedSafe, used to open the folding knife. Liner Lock: Locks the blade open during use; one side of the knife’s steel "liner," the steel plate to which the handle scales are attached, moves into position behind the blade to securely lock it open. Reversible: Pre-drilled holes in the handle enable the user to change either the tip position or the side on which the knife carries.

Product Details

  • Shipping Weight: 2.4 ounces (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S.
  • Origin: Made in USA or Imported
  • ASIN: B00AU6NTNE
  • Item model number: 3820
  • Average Customer Review: 4.4 out of 5 stars  See all reviews (8 customer reviews)
  • Amazon Best Sellers Rank: #40,763 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
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Customer Questions & Answers

Customer Reviews

4.4 out of 5 stars
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Most Helpful Customer Reviews

5 of 6 people found the following review helpful By Robert A. Laycock on October 2, 2013
Verified Purchase
I am a big Kershaw fan and I love the looks of this knife. This knife calls out to me for some reason and it feels solid in hand. The only problem I have with this knife is the bead-blast finish. This steel, 8cr13mov, is not the most rust resistant steel, and in combination with the bead-blast finish, the blade rusts easily. I had this in my pocket for exactly 1 day before it started rusting. Normally, for EDC, I don't have to have an oil coating on my blades, but this knife, it is required. While the finish does add to the knife's looks, it makes me not want to use it. If they had put stonewash finish or a coating on the blade, I would like this knife much better.
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2 of 2 people found the following review helpful By Oxy on December 16, 2013
Verified Purchase
I love Kershaw blades.
Living in Chicago, i try to EDC knives on the smaller side that are inconspicuous, and prior to this blade i had been EDCing the Skyline for little over 2 years.

This blade is as close to EDC perfection as it gets. It addressed my main gripes with the skyline, moving the clip down the handle for better concealment and pocket retention, as well as incorporating a full flat grind into a $30 knife.

8crmov is just fine, it requires sharpening and maintenance but in this price range there is really no difference between steels.

The 3d machined g10 scales are grippy and insanely comfortable, the blade is wicked fast, came razor sharp and after a semester of heavy use on and off of job sites, this blade still locks up tight as a drum.

Subjectively i find the design to be incredibly aesthetic and definitely got admired the first few times I used it around coworkers.
Buy this knife, there is nothing better for small sized EDC blades.
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1 of 1 people found the following review helpful By Fred Huggins on January 12, 2014
Verified Purchase
Bought three knives for Christmas, everybody happy. I've been carrying a Kershaw for several years now and am pleased to carry the Todd Rexford designed Injection.
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By B. Cao on April 14, 2014
Verified Purchase
I really like the design and shape of this knife. I've always been a fan to the full grinds and this is no different. The one thing you'll want to learn is the thumb flick to open this just as fast as one of their assisted opening knives. I probably would have liked it a little more if the handle were a little thinner, but the thicker handle does give a better grip - so no point deductions for that. Overall a pretty good knife for a very reasonable cost.
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