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Safety Technology OTF (Out The Front) Automatic Heavy Duty Knife with Double Edge Blade — 3.75-Inch Premium Steel, 9.5-Inch Overall, Lightning-Fast Deployment, Easy Retraction, 5.75-Inch Collapsed

SKU: ST-AK-103
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Original price was: $69.95.Current price is: $59.46.

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An OTF knife deploys the blade straight out the front of the handle — fast, decisive, and ready. This double-edge model gives you a 3.75-inch premium steel blade that fires forward with one thumb slide and retracts just as easily. Built heavier than a standard folder at 0.7 lbs, it's designed for people who want serious capability in a proven mechanism.

  • 3.75-inch double edge blade made of premium quality steel
  • OTF (Out The Front) automatic deployment — blade fires straight forward
  • Fast, easy blade retraction with one-hand thumb slide operation
  • 9.5-inch overall length, collapses to 5.75 inches for carry
  • Heavy-duty 0.7 lb construction built for demanding use

Out The Front, Ready to Work

An OTF knife works differently from a standard folder. Instead of the blade swinging out to the side, it fires straight forward out the front of the handle with a thumb slide. That means faster deployment, a more natural grip during opening, and a mechanism that’s been trusted by military and first responders for decades. This double-edge model gives you cutting capability on both sides of the blade.

Who This Knife Is For

This is a step up from a basic folding knife. It’s for someone who wants a more capable tool — whether that’s an EMT who needs to cut seatbelts and clothing fast, an outdoor professional who handles heavy rope and material, or someone who appreciates the reliability and precision of an OTF mechanism. The double-edge blade provides cutting surface on both sides, which is useful in situations where you’re working in tight spaces or cutting in multiple directions.

If you’ve used standard folders and want something more decisive in the hand, this OTF is a natural step up.

Is This the Right Choice for You?

Choose this OTF Double Edge if you want:

  • Lightning-fast OTF deployment that fires the blade straight forward
  • A double-edge blade for versatile cutting in tight or awkward positions
  • Heavy-duty construction for demanding tasks and hard use

Consider something else if you need:

  • A single-edge blade for safer everyday utility work — the single-edge OTF version is available
  • A lighter, more compact pocket knife — the standard automatic knives weigh nearly half as much

How the OTF Mechanism Works

The OTF mechanism uses an internal spring system operated by a thumb slide on the handle. Push the slide forward and the blade fires out the front of the handle into a locked position. To retract, slide it back — the blade pulls back inside the handle cleanly. The entire sequence is one-handed, fast, and reliable.

The 3.75-inch double-edge blade is made from premium quality steel designed to hold an edge under hard use. Both edges are sharpened, which gives you cutting capability in any direction without repositioning. The 9.5-inch overall length provides good reach and leverage, while the 5.75-inch collapsed size keeps it manageable for belt or pocket carry. At 0.7 lbs, you know it’s in your hand — this is a substantial tool built for real work.

Quick Comparison: How Does the OTF Double Edge Stack Up?

Feature OTF Double Edge OTF Single Edge Auto Knife (Folding) Pepper Spray
Blade Length 3.75 inches ✔ 3.5 inches 3.5 inches N/A
Edge Type Double edge ✔ Single edge Single edge N/A
Deployment OTF — straight out ✔ OTF — straight out ✔ Side-open Spray/stream
Weight 0.7 lbs 0.7 lbs 0.4 lbs ✔ Varies
Overall Length 9.5 inches ✔ 9 inches 8 inches N/A
Best For Heavy duty — multi-directional cut Heavy duty — standard use Light EDC Distance defense

Practical Details

Overall length is 9.5 inches open, 5.75 inches collapsed. Blade measures 3.75 inches, premium quality steel, double edge. Dimensions are 9.5 x 1.38 inches. Total weight is 0.7 lbs. OTF automatic deployment with thumb slide. Black color. Manufactured by Safety Technology.

When you want a knife that deploys fast, cuts on both edges, and feels like a serious tool in your hand, this OTF double edge delivers the kind of capability that standard folders can’t match.

What’s the difference between OTF and a regular automatic knife?

A regular automatic knife swings the blade out to the side like a folding door. An OTF knife fires the blade straight out the front of the handle like a piston. OTF deployment is faster, allows a more natural grip position, and keeps the blade path clear of your fingers. Both are automatic — the mechanism is what differs.

Why choose double edge over single edge?

A double-edge blade lets you cut in either direction without flipping or repositioning the knife. This is an advantage when working in tight spaces, cutting material from multiple angles, or in situations where speed matters. A single-edge blade is generally preferred for everyday utility tasks where a flat back edge is useful for applying pressure.

Is 0.7 lbs too heavy for everyday carry?

It depends on what you’re used to carrying and what you need the knife for. At 0.7 lbs, this OTF is noticeably heavier than a standard pocket folder. If you want a lighter option for basic everyday tasks, the standard automatic knives in this lineup weigh 0.4 lbs. If you want the capability and reach of an OTF, the weight is part of the package.

Type of KnifeAutomatic
Overall Length9.5 inches
Blade Length3.75 inches
Collapsed Length5.75 inches
Weight0.7 lbs
Dimensions9.5" x 1.38"

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