OTF Automatic Knife – 3.5″ Single Edge, 9″ Overall

When you need a knife that opens fast and feels solid in your hand, a good out-the-front automatic is hard to beat. The OTF Automatic Knife gives you a 3.5-inch single-edge blade that shoots forward from the handle with a single thumb motion — no fumbling, no two-handed maneuver. At 9 inches overall and just 0.7 lbs, it’s substantial enough to take seriously and balanced enough to carry daily.

Who This Knife Is For

This is a working knife for people who want quick, dependable access. It fits the outdoorsman who needs a blade ready without taking his eyes off the trail. It fits the tradesperson who reaches for a knife a dozen times a day. And it fits the person who carries for personal defense and wants something they can deploy with one hand under pressure. If you’re looking for a compact folder or a lightweight utility blade, this isn’t it — this is a full-size, heavy-duty tool built for people who mean it.

Is It the Right Fit for You?

Choose It If You Want

• One-handed, out-the-front deployment without flipping or thumb-stud manipulation
• A full 9-inch overall length with real presence in the hand
• A heavy-duty build that holds up to regular use
• A single-edge blade that’s straightforward to sharpen and control

Consider Another Option If You Need

• A smaller, more pocket-friendly folding knife for light everyday carry
• A fixed-blade knife for heavy outdoor or survival tasks
• A multi-tool with additional functions beyond a blade

OTF Automatic Knife Features and Benefits

• Out-the-Front Automatic Deployment: The blade fires forward from the handle with a single thumb slide — fast and one-handed when it counts.
• 3.5-Inch Single-Edge Blade: A practical blade length that balances reach and control, single-edge for clean, predictable cutting.
• 9-Inch Overall Length: Full-size presence without being unwieldy — 5.5 inches collapsed for carry, 9 inches deployed.
• Heavy-Duty Construction: Built to handle real use, not just to look good in a display case.
• Black Steel Finish: Low-profile, corrosion-resistant appearance that holds up over time.
• Lightweight at 0.7 lbs: Enough weight to feel solid without fatiguing your hand or weighing down your pocket.
• Compact Collapsed Profile: At 5.5 inches closed and 1.25 inches wide, it rides in a pocket or on a belt without bulk.

How the OTF Automatic Knife Compares

Here’s how this knife stacks up against two common alternatives by type.

Care and What’s Included

What’s in the Box

The OTF Automatic Knife ships as a single unit. No accessories or carrying case are listed with this model — confirm current packaging at checkout.

Care

Wipe the blade clean and dry after use to protect the black steel finish. Keep the deployment channel free of debris so the mechanism slides cleanly. Periodically apply a small amount of oil to the blade pivot and channel to maintain smooth action. Sharpen the single edge with a consistent angle to preserve the blade geometry.

Legal Notes

Automatic knives, including out-the-front designs, are legal to own and carry in many U.S. states, but some states, counties, cities, and venues restrict or prohibit them — including automatic-opening mechanisms specifically. Laws change. Check your state and local ordinances before you buy or carry this knife. This is your responsibility as the buyer, and I’m not in a position to give you legal advice.

OTF Automatic Knife: Frequently Asked Questions

How does the OTF Automatic Knife open and close?

The blade deploys out the front of the handle when you slide the thumb actuator forward. To retract, you reverse the motion — same actuator, opposite direction. This is the standard OTF mechanism: one hand, one thumb, no wrist snap required. Keep the channel clean and lightly oiled and it will cycle smoothly for years.

What is the blade length of the OTF Automatic Knife?

The blade is 3.5 inches. Overall deployed length is 9 inches, and collapsed length is 5.5 inches. The blade is single-edge with a black steel finish. Those dimensions put it squarely in the full-size carry range — not a keychain knife, not a large hunting blade.

Is this a good knife for everyday carry?

It depends on how you carry. At 0.7 lbs and 5.5 inches collapsed, it fits in a front pocket or on a belt without serious bulk. If you want the fastest possible one-handed deployment and you’re comfortable with a full-size knife on your person, yes, it’s a practical everyday carry. If you prefer something lighter and more minimal, look at a compact folder.

Is the OTF Automatic Knife legal in my state?

Automatic knives are regulated differently across states, counties, and municipalities. Some jurisdictions prohibit OTF mechanisms entirely; others allow them with blade-length limits or carry restrictions. I can’t tell you what your local laws say, and they change. Before you order, look up your state knife laws and any county or city ordinances that apply to automatic knives. That homework is worth doing.

Add This Knife to Your Everyday Carry

The OTF Automatic Knife is a serious tool at a fair price — heavy-duty build, fast deployment, and a blade length that works for real tasks. Check your local laws first. Once you’re clear, add it to your cart and have something dependable ready when you reach for it.