Safety Technology OTF (Out The Front) Automatic Heavy Duty Knife with Single Edge Blade — 3.5-Inch Premium Steel, 9-Inch Overall, Lightning-Fast Deployment, Easy Retraction, 5.5-Inch Collapsed
Original price was: $69.95.$59.46Current price is: $59.46.
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This OTF automatic knife gives you the same fast, straight-out-the-front deployment with a single-edge blade that's more versatile for everyday utility work. The flat back edge lets you apply thumb pressure for controlled cuts, which matters when you're doing detail work. Same heavy-duty build, same one-hand operation, with a blade profile designed for practical daily use.
- 3.5-inch single edge blade made of premium quality steel
- OTF (Out The Front) automatic deployment — blade fires straight forward
- Flat back edge allows thumb pressure for controlled, precise cutting
- 9-inch overall length, collapses to 5.5 inches for practical carry
- Heavy-duty 0.7 lb construction for demanding tasks and hard use
OTF Speed, Everyday Versatility
Not everyone needs a double-edge blade. This single-edge OTF gives you the same lightning-fast deployment and easy retraction with a blade profile that’s more practical for everyday work. The flat back edge lets you place your thumb for controlled cuts — useful when you’re working with precision rather than speed. It’s the same heavy-duty OTF platform built for people who want a versatile work knife that also deploys when it counts.
Who This Knife Is For
This OTF is for someone who wants the speed and reliability of out-the-front deployment but uses their knife primarily as a work tool. Tradespeople, outdoorsmen, and first responders who cut rope, packaging, strapping, and material daily will appreciate the single-edge profile. The flat spine gives you a natural thumb rest for push cuts and lets you apply force to the back of the blade when needed.
If you want OTF capability with a blade that’s suited for both utility tasks and personal readiness, the single edge gives you the best of both.
Is This the Right Choice for You?
Choose this OTF Single Edge if you want:
- OTF automatic deployment with a utility-friendly single-edge blade
- A flat back edge for controlled cuts and thumb pressure
- Heavy-duty construction in a proven OTF mechanism
Consider something else if you need:
- Double-edge cutting capability — the double-edge OTF model offers that
- A lighter knife for basic pocket carry — the standard automatic knives weigh 0.4 lbs
Built for Work, Deploys for Anything
The single-edge blade is 3.5 inches of premium quality steel with a sharpened cutting edge on one side and a flat spine on the other. That flat spine isn’t just for safety — it’s a functional feature. Placing your thumb on the back of the blade gives you leverage and control for tasks like whittling, scoring material, or making precise cuts where a double-edge blade would be unwieldy.
The OTF mechanism works the same as the double-edge model — thumb slide forward deploys the blade, thumb slide back retracts it. One hand, one motion, done. The 9-inch overall length gives you solid reach and handling, while the 5.5-inch collapsed size fits in a cargo pocket or on a belt. At 0.7 lbs, it has the heft of a tool that’s made for hard use rather than display.
Quick Comparison: How Does the OTF Single Edge Stack Up?
| Feature | OTF Single Edge | OTF Double Edge | Auto Knife (Folding) | Personal Alarm |
|---|---|---|---|---|
| Blade Length | 3.5 inches | 3.75 inches ✔ | 3.5 inches | N/A |
| Edge Type | Single — utility friendly ✔ | Double — multi-directional | Single ✔ | N/A |
| Deployment | OTF — straight out ✔ | OTF — straight out ✔ | Side-open | Pull pin |
| Controlled Cuts | Flat spine for thumb ✔ | No thumb rest | Yes ✔ | N/A |
| Weight | 0.7 lbs | 0.7 lbs | 0.4 lbs ✔ | Light ✔ |
| Best For | Utility work + readiness | Multi-directional cutting | Light EDC | Drawing attention |
Practical Details
Overall length is 9 inches open, 5.5 inches collapsed. Blade measures 3.5 inches, premium quality steel, single edge. Dimensions are 9 x 1.25 inches. Total weight is 0.7 lbs. OTF automatic deployment with thumb slide. Black color. Manufactured by Safety Technology.
When you want OTF speed and reliability in a blade that works as hard as you do every day, this single-edge knife gives you professional-grade capability in a carry-ready package.
Which is better for everyday use — single edge or double edge?
For everyday utility work, most people prefer a single-edge blade. The flat back edge lets you apply thumb pressure for controlled cuts and is safer to handle in tight spaces. A double-edge blade is better when you need to cut in multiple directions quickly. If your knife is primarily a work tool, the single edge is the more practical choice.
How does this compare to the standard folding automatic knives?
The OTF is a bigger, heavier knife with a different deployment mechanism. The standard automatics weigh 0.4 lbs and collapse to 4.5 inches — they’re lighter and more pocket-friendly. The OTF weighs 0.7 lbs and collapses to 5.5 inches — it’s a more substantial tool with faster straight-line deployment. Choose based on whether you prioritize compact carry or capability.
Is the OTF mechanism reliable?
OTF mechanisms have been used by military and law enforcement professionals for decades. The internal spring system is proven and durable when maintained properly. Keep the mechanism clean and free of debris, and it will deploy consistently over thousands of uses. If you notice the blade slowing down, a quick cleaning of the channel usually restores full performance.
| Type of Knife | Automatic |
|---|---|
| Overall Length | 9 inches |
| Blade Length | 3.5 inches |
| Collapsed Length | 5.5 inches |
| Weight | 0.7 lbs |
| Dimensions | 9" x 1.25" |
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