1. Product Overview
The OKNIFE U1 Ultra Pocket Folding Utility Knife is designed for versatility and durability, featuring a ceramic blade and a robust O-Aluminum handle. This manual provides essential information for safe and effective use, maintenance, and troubleshooting.

Figure 1: OKNIFE U1 Ultra Pocket Folding Utility Knife in Zombie Pink. This image displays the overall design of the knife, highlighting its compact form factor and vibrant handle color.

Figure 2: Close-up of the OAL Super Aluminum Handle. The handle is crafted from advanced OAL super aluminum with a tough ceramic coating, providing durability and a lightweight feel for comfortable handling.
2. Package Contents
Verify that all items are present in your package:
- U1 Ultra Pocket Folding Utility Knife (Zombie Pink) x1
- Black Ceramic Utility Blade x1
- White Ceramic Utility Blade x1
- Instruction Manual x1
- Cue Card x1
- Blade Replacement Tool x1
3. Setup
3.1 Blade Installation and Replacement
The U1 Ultra is designed for easy and secure blade changes. Always handle blades with extreme caution.
- Loosen the Screw: Locate the locking screw on the blade holder. Use the provided blade replacement tool or a suitable pair of pliers to loosen the screw.
- Insert/Remove Blade: Carefully slide out the old blade or insert the new blade. Ensure the blade is fully and properly inserted into the blade holder.
- Tighten the Screw: Tighten the locking screw firmly to secure the blade in place. This eliminates blade wobble and ensures safe operation.

Figure 3: Secure Blade Mechanism. The screw-secured design ensures rock-solid stability for pinpoint accuracy and minimizes slipping during use.

Figure 4: Quick and Safe Blade Change. This diagram provides a visual guide for replacing the utility blade, emphasizing the importance of loosening and tightening the securing screw.
4. Operating Instructions
4.1 Opening the Knife (3 Ways)
The U1 Ultra offers three convenient methods for quick deployment:
- Button Lock: Press the button lock to release the blade and open the knife.
- Thumb Stud: Use the thumb stud to manually push the blade open.
- Flipper: Engage the flipper tab with your finger to rapidly deploy the blade.

Figure 5: Three Ways to Open. This illustration demonstrates the button lock, thumb stud, and flipper mechanisms for deploying the blade.
4.2 Closing the Knife
To safely close the knife, press the button lock and gently fold the blade back into the handle until it is fully retracted and locked.
4.3 Secure Carry
The U1 Ultra features a deep-carry pocket clip for secure and discreet everyday carry. The extended blade holder design ensures the blade's spine is fully covered when closed.

Figure 6: Easy to Carry. The deep-carry pocket clip allows for secure and discreet attachment to clothing, ensuring the knife is ready when needed.
5. Maintenance
5.1 Blade Care
The U1 Ultra comes with premium zirconium oxide ceramic blades. These blades offer 1200HV hardness, are rust-free, razor-sharp, and stain-resistant. While highly durable, ceramic blades can be more prone to chipping or breaking if subjected to twisting or binding forces compared to traditional metal blades. Standard utility knife blades can also be used as replacements if preferred.

Figure 7: Advanced Ceramic Blades. The ceramic blades maintain their edge sharpness longer than steel and resist corrosion, making them ideal for various cutting tasks.
5.2 Cleaning
To clean your U1 Ultra, hand wash only. Avoid harsh chemicals or abrasive materials that could damage the ceramic coating or blade.
6. Troubleshooting
- Issue: Blade Wobble
Solution: Ensure the screw securing the blade is fully tightened. The screw-secured design is specifically engineered to eliminate blade wobble for accurate and confident cuts. - Issue: Stiff Button Lock
Solution: A new button lock mechanism may feel stiff initially. Regular use will help to break it in and improve smoothness. Gently resting your thumb on the button while operating the flipper can also help to prevent sticking.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | OKNIFE |
| Model Name | U1 Ultra |
| Handle Material | O-Aluminum |
| Blade Material | Ceramic (Zirconium Oxide) |
| Color | Zombie Pink |
| Item Length | 3.84 Inches |
| Hand Orientation | Ambidextrous |
| Blade Shape | Clip Point |
| Product Care Instructions | Hand Wash Only |
8. Warranty & Support
The OKNIFE U1 Ultra Pocket Folding Utility Knife is backed by a lifetime warranty. For any support inquiries, please refer to the manufacturer's official website or contact their customer service directly.
