Safety Technology OTF Automatic Knife ST-AK-104 – Single Edge 3.5-Inch Blade, Out The Front Deployment, Premium Steel, Belt Clip, Glass Breaker Tip, 9-Inch Overall, 5.5-Inch Collapsed, Black
$69.95
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This single-edge OTF knife deploys the blade straight from the handle — forward to open, back to close. It adds a belt clip for everyday carry and a glass breaker tip on the handle end, making it a more practical all-around tool than a blade-only design. Built from premium steel at 0.7 lbs.
- Out The Front deployment with single-edge 3.5-inch blade
- Belt clip for secure, accessible daily carry
- Glass breaker tip integrated into the handle base
- Collapses to 5.5 inches — compact enough for pocket or belt
- Premium steel construction weighing 0.7 lbs
An OTF Built for Everyday Practicality
The double-edge OTF appeals to a specific user. This single-edge version is built for a wider range of people. One cutting edge means you can rest a finger on the spine for control, use it for standard cutting tasks without overthinking blade orientation, and handle it more naturally if you’re transitioning from a traditional folder.
The belt clip and glass breaker tip signal what this knife is really for: daily carry as a practical tool, not a specialty item.
Who This Knife Is For
People who want OTF deployment but prefer the safety and familiarity of a single-edge blade. Daily carriers who value the belt clip for consistent positioning. First responders, drivers, or outdoor users who find the glass breaker tip adds genuine utility.
If you’ve been curious about OTF knives but felt the double-edge models were more specialized than you needed, this is the more approachable version of that same mechanism.
Is This the Right Choice for You?
Choose this OTF knife if you want:
- Single-edge blade for safer, more intuitive handling
- Built-in belt clip and glass breaker for added daily utility
- OTF deployment that works in tight spaces without side clearance
Consider something else if you need:
- Double-edge cutting geometry — the ST-AK-103 offers that
- A lighter carry knife — at 0.7 lbs, this is heavier than most folders
- Something legal everywhere — OTF restrictions apply in many areas
Practical Features That Earn Their Place
The belt clip isn’t an afterthought. It positions the knife for consistent draw — you know exactly where it is and which direction it faces. For people who carry a knife daily, that consistency matters. You develop muscle memory for accessing it, which means less fumbling when your hands are full or you’re working in poor conditions.
The glass breaker tip on the handle base serves a straightforward purpose: breaking tempered glass in vehicle emergencies. It’s a hardened point that concentrates force on a small area. Whether you work around vehicles, drive regularly, or spend time in situations where vehicle egress might matter, having that capability integrated into a tool you’re already carrying makes practical sense. It’s not a gimmick when it’s built into a knife this substantial.
The single-edge blade offers a flat spine for thumb placement during controlled cuts. This gives you significantly more precision and control than a double-edge profile. For most cutting tasks — opening packages, cutting rope, slicing materials — a single edge is all you need and safer to handle.
Quick Comparison: How Does This OTF Stack Up?
| Feature | OTF Single Edge | OTF Double Edge | Side-Open Auto | Manual Folder |
|---|---|---|---|---|
| Deployment | Forward/back ✓ | Forward/back ✓ | Side swing | Manual |
| Blade Edges | Single — safer handling ✓ | Double — more versatile | Single | Single |
| Belt Clip | Yes ✓ | No | Varies | Varies |
| Glass Breaker | Yes ✓ | No | Rarely | Rarely |
| Weight | 0.7 lbs | 0.7 lbs | 0.4 lbs ✓ | 0.2-0.4 lbs ✓ |
| Best For | Daily carry, practical utility | Experienced users | Everyday pocket carry | Universal legality |
Practical Details
Overall length is 9 inches open. Collapsed length is 5.5 inches. Blade length is 3.5 inches, single-edged. Weight is 0.7 lbs. Dimensions are approximately 9 by 1.25 inches. Black finish. Includes belt clip and glass breaker tip. Premium steel construction throughout. OTF and automatic knives are regulated in many jurisdictions — confirm legality in your area before purchasing.
An OTF knife that balances capability with everyday practicality. The belt clip, glass breaker, and single-edge blade make it the most carry-friendly OTF in this lineup.
How does this compare to the double-edge OTF model?
Same OTF mechanism, same premium steel, same weight class. The differences are the single-edge blade (safer for general use), the belt clip (better for daily carry), and the glass breaker tip (added utility). If you’re choosing between the two for everyday carry, this is the more practical option. The double-edge is for users who specifically need that blade geometry.
Does the glass breaker actually work?
Yes — it’s a hardened steel point designed to fracture tempered automotive glass on impact. You strike the glass with the handle base using firm, direct force. It won’t work on laminated windshields (those are designed not to shatter), but it handles side and rear tempered glass effectively. Keep the point clean and free of damage for reliable function.
Will the belt clip hold up over time?
The clip is steel and mounted with screws, not riveted or glued. It’s designed for daily on-and-off use. Over time, any clip can loosen slightly — tightening the mounting screws periodically keeps it secure. The clip tension itself holds well against standard belt and pocket widths without being so tight that drawing the knife is difficult.
| 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" |
Additional information
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