OTF Out-The-Front Automatic Heavy Duty Knife Single Edge Blade – Premium Steel, 3.5″ Blade, 9″ Overall Length, Fast Deploy and Easy Retract

SKU: ST-AK-104
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$69.95

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OTF automatic with a single-edge blade — same lightning-fast out-the-front deployment, but with a traditional single-sided cutting edge that's more versatile for everyday utility tasks. Premium steel, clean black finish, 3.5-inch blade at 9 inches overall. The single edge makes it a practical choice if you want the OTF mechanism without the double-edge profile.

  • OTF automatic deployment — blade extends straight out the front, retracts with the same button
  • Single-edge blade, 3.5" — traditional cutting geometry, versatile for utility and carry
  • 9" overall length — substantial knife with a 5.5" collapsed profile
  • Premium quality steel — holds an edge with regular use
  • Clean black finish — blade and handle in matching matte black

The OTF Mechanism With a More Traditional Edge

OTF deployment is one of the fastest and most satisfying blade mechanisms out there — the blade fires forward and snaps into locked position almost instantly. This version pairs that mechanism with a single-edge blade, which is what most people are used to working with. Single-edge geometry is better for slicing, food prep, rope cutting, and general utility tasks where you want control over one sharp side.

At 9 inches overall with a 3.5-inch blade, it’s a practical size. The premium steel holds up with real use, and the matte black finish on both blade and handle stays clean and doesn’t attract a lot of attention.

Who This Knife Is For

This is the right pick for someone who wants the speed advantage of an OTF knife but prefers a single-edge blade for everyday cutting tasks. If you’ve looked at the double-edge version and thought “that’s too specialized,” this one gives you the same deployment with a more familiar and versatile cutting profile.

It also makes sense for people in jurisdictions where double-edge blades have additional restrictions — single-edge automatics are more broadly permitted in areas that allow automatic knives generally. If you’re going to carry it regularly, the single-edge is typically the more practical choice.

Is This the Right Choice for You?

Choose this OTF single-edge knife if you want:

  • Out-the-front automatic deployment with a traditional single-edge blade
  • A versatile cutting profile for utility tasks and everyday carry
  • Fewer legal complications than a double-edge blade in many jurisdictions
  • Premium steel in a 9-inch overall package that’s still pocketable at 5.5″ closed

Consider something else if you need:

  • A double-edge blade for cutting on both sides without repositioning
  • A lighter carry option — at 0.7 lbs it’s heavier than the side-deploy models
  • A shorter knife — at 9 inches open it’s on the larger end of everyday carry

How It Actually Works

Press the deployment button and the blade slides straight out the front of the handle and locks in place. Press again and it retracts cleanly back in. The action is fast and consistent — there’s no hesitation in either direction when the mechanism is properly maintained.

The single-edge blade is sharpened on one side with a spine on the other, which gives you better control for precise cutting and makes the knife safer to grip along the spine if you need extra leverage. At 3.5 inches, the blade is a functional everyday length — enough reach to be useful without being excessive.

Quick Comparison: How Does This OTF Knife Stack Up?

Feature OTF Single Edge OTF Double Edge 5-Hole Auto Knife Solid Handle Auto Knife Traditional Folder
Deployment Out-the-front auto ✓ Out-the-front auto ✓ Side-button auto Side-button auto Manual
Blade Edge Single edge ✓ Double edge Single edge ✓ Single edge ✓ Single edge ✓
Blade Length 3.5″ 3.75″ ✓ 3.5″ 3.5″ Varies
Overall Length 9″ 9.5″ ✓ 8″ 8″ Varies
Weight 0.7 lbs 0.7 lbs 0.4 lbs ✓ 0.4 lbs ✓ Varies
Best For OTF speed, utility cutting, EDC OTF speed, double-edge cutting Lightweight everyday carry Full-grip everyday carry Traditional preference

Practical Details

Overall length: 9 inches open. Collapsed length: 5.5 inches. Blade length: 3.5 inches, single edge. Dimensions: 9″ x 1.25″. Weight: 0.7 lbs. Material: premium quality steel, matte black finish on blade and handle. OTF automatic deployment and retraction with same-button operation.

If you want the fast, satisfying OTF mechanism with a single-edge blade that’s more practical for everyday cutting, this is the more versatile choice.

Frequently Asked Questions

What’s the practical advantage of a single-edge blade over a double-edge on an OTF knife?

The single edge gives you a spine on the back of the blade that you can brace against or guide with your finger for controlled cutting. It’s more familiar geometry for most users and better suited to utility tasks like slicing rope, breaking down boxes, or food prep. It’s also more broadly legal — some states that allow automatic knives have additional restrictions specifically on double-edge blades. For everyday practical use, single-edge is the more versatile option.

How does this OTF knife compare in size to a regular pocket knife?

At 5.5 inches collapsed and 0.7 lbs, it’s larger and heavier than most traditional folders. It’ll fit in a front jeans pocket, but it’s noticeable — this isn’t a slim lightweight carry. If you’re used to a smaller everyday carry blade, it may take some adjustment. The OTF mechanism does keep the handle slim since the blade slides in rather than folding, which helps with pocket profile compared to some larger folders.

Is this OTF knife legal to own and carry?

OTF knives fall under automatic knife or switchblade laws in most jurisdictions. Laws vary widely by state and sometimes by local ordinance. Many states allow ownership and carry with blade length limits, while others have broader restrictions. Single-edge blades generally face fewer restrictions than double-edge in states that regulate blade type. Always verify current laws in your state and locality before purchasing or carrying.

Type of KnifeAutomatic
Overall Length9 inches
Blade Length3.5 inches
Collapsed Length5.5 inches
Weight0.7 lbs
Dimensions9" x 1.25"

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