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Safety Technology Automatic Heavy Duty Knife with 5-Hole Handle — 3.5-Inch Stainless Steel Blade, 8-Inch Overall, Safety Lock, One-Hand Deployment, 4.5-Inch Collapsed, Belt-Ready EDC Knife

SKU: ST-AK-101
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Original price was: $18.95.Current price is: $16.11.

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A well-made knife is a tool, plain and simple. This automatic knife opens with one hand, locks into position, and folds down to 4.5 inches for easy carry. The 3.5-inch stainless steel blade and heavy-duty build handle real work — cutting rope, opening packages, or keeping on hand for everyday tasks and personal readiness.

  • 3.5-inch stainless steel blade with automatic one-hand deployment
  • Safety lock prevents accidental opening in your pocket or bag
  • 8-inch overall length with 4.5-inch collapsed for compact carry
  • 5-hole stainless steel handle for secure grip and reduced weight
  • Heavy-duty construction at 0.4 lbs — built for real use, not display

A Reliable Blade You Can Count On

In the real world, a good knife is one of the most useful tools you can carry. Whether you’re cutting zip ties, breaking down boxes, or handling outdoor tasks, having a reliable blade within reach just makes sense. This automatic knife opens with one hand using spring-assisted deployment, locks solid, and folds compact enough to carry all day without thinking about it.

Who This Knife Is For

This knife is for anyone who uses a blade regularly — warehouse workers, outdoor enthusiasts, first responders, or just folks who appreciate having the right tool handy. The automatic opening makes it practical when one hand is occupied holding a flashlight, carrying something, or managing a situation. The safety lock gives you confidence it won’t pop open in your pocket.

If you’re looking for an affordable everyday carry knife that’s built solid and works when you need it, this gets the job done without overcomplicating things.

Is This the Right Choice for You?

Choose this Automatic Knife if you want:

  • One-hand automatic deployment with a safety lock
  • A compact folding knife with a full 3.5-inch blade
  • An affordable EDC knife built for daily use

Consider something else if you need:

  • A longer blade — the OTF models in this lineup offer 3.75-inch blades
  • A non-automatic knife for areas with blade restrictions — check your local laws

Built for the Job

The 3.5-inch blade is stainless steel — resistant to corrosion and easy to maintain with basic care. Spring-assisted automatic deployment means one press opens the blade fully and locks it into position. The safety lock is a separate mechanism that prevents the blade from deploying accidentally, which matters when this knife is riding in your pocket next to your keys and phone.

The 5-hole handle design serves two purposes. It reduces overall weight while maintaining a full grip surface, and the holes provide tactile reference points so you can orient the knife by feel in low light or tight spaces. The stainless steel handle is durable enough for hard use without adding unnecessary bulk. At 8 inches open and 4.5 inches closed, it’s a practical size that balances blade length with pocket-friendly carry.

Quick Comparison: How Does This Knife Stack Up?

Feature Auto Knife (5-Hole) Auto Knife (Solid) OTF Double Edge Pepper Spray
Blade Length 3.5 inches ✔ 3.5 inches ✔ 3.75 inches ✔ N/A
Deployment Side-open auto ✔ Side-open auto ✔ OTF auto ✔ Spray/stream
Weight 0.4 lbs ✔ 0.4 lbs ✔ 0.7 lbs Varies
Safety Lock Yes ✔ Yes ✔ Yes ✔ Safety cap
Price Range Budget-friendly ✔ Budget-friendly ✔ Mid-range Budget-friendly
Best For Light EDC — grip texture Light EDC — smooth grip Heavy-duty tasks Distance defense

Practical Details

Overall length is 8 inches open, 4.5 inches collapsed. Blade measures 3.5 inches, stainless steel. Handle is stainless steel with a 5-hole design. Total weight is 0.4 lbs. Dimensions are 8 x 1.38 inches. Safety lock prevents accidental deployment. Black color. Manufactured by Safety Technology.

A solid knife that opens fast, locks firm, and carries easy. Keep it on you and you’ll have the right tool ready when the job calls for it.

Are automatic knives legal in my state?

Automatic knife laws vary significantly by state and municipality. Some states allow ownership and carry freely, while others have restrictions on blade length, concealment, or automatic mechanisms. Before purchasing, check your state and local laws regarding automatic knives to ensure you’re in compliance.

What’s the difference between this and the solid handle version?

Both knives share the same blade length, overall dimensions, and automatic mechanism. The difference is the handle — this model has a 5-hole design that provides textured grip points and slightly reduced weight, while the solid handle version offers a smooth, uninterrupted grip surface. Choose based on your grip preference.

How do I maintain the blade?

Keep the blade clean and dry after use. A light coat of oil on the blade prevents corrosion. The spring mechanism should be kept free of debris. Sharpen with a standard knife sharpener when the edge dulls. With basic care, a stainless steel blade will last for years of regular use.

Type of KnifeAutomatic
Overall Length8 inches
Blade Length3.5 inches
Collapsed Length4.5 inches
Handle MaterialStainless Steel
Weight0.4 lbs
Dimensions8" x 1.38"

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