FK Irons One Adjust Tattoo Pen
Product information "FK Irons One Adjust Tattoo Pen"
FK Irons One Adjust – Wireless tattoo machine with adjustable stroke | Premium wireless tattoo pen
FK Irons One Adjust – The revolution in wireless tattoo technology
Imagine being able to switch from precise linework to soft shading in the middle of a session – without changing machines, without switching off, without interruption. With the FK Irons One Adjust, that's exactly what happens. This wireless tattoo machine sets new standards and combines uncompromising flexibility with proven FK Irons quality.
Unique stroke adjustment during operation
At the heart of the One Adjust is patented stroke adjustment technology. You can adjust the stroke during a session—effortlessly, without missing a single stroke. Whether you're working with fine lines, rich color packing, or delicate shading, one setup covers it all. No more machine changes, no more cam swaps, no more compromises. The One Adjust adapts to your style, not the other way around.
Wireless freedom for marathon sessions
With two interchangeable, rechargeable batteries, you can work for up to 12 hours without interruption. The large battery provides up to 6.5 hours of power, the smaller one another 5.5 hours. Thanks to the included dual-slot charger, you always have a full battery at your fingertips. While you're tattooing, the spare battery charges—for true nonstop performance.
Technical specifications
| Category | Details |
|---|---|
| Lift adjustment | Infinitely adjustable during operation (patented technology) |
| Power supply | Wireless with rechargeable drop-in batteries |
| Battery type | 2x Panasonic NCR 18500A (premium quality) |
| Battery life | Up to 6.5 hours (depending on settings) |
| Short battery life | Up to 5.5 hours (depending on settings) |
| Total runtime | 12+ hours with both batteries |
| Voltage range | 5-12 volts |
| Voltage adjustment | Adjustable in 0.5V increments |
| Charger | Dual-slot charger (both batteries can be charged simultaneously) |
| Battery replacement | Quick-Twist system – change in seconds |
| Operation | 3-button system (up/down/power) |
| LED display | Color-coded voltage display (flashes in 0.5V increments) |
| Handle | Ergonomic, with click grip Needle depth adjustment |
| Grip compatibility | All modular FK grips (including Disposable grips) |
| Needle compatibility | Compatible with most standard needle cartridges |
| Weight | Lightweight design for fatigue-free working |
| Manufacturing | Designed, developed, and manufactured in the USA |
| Material | Highest quality steel available, extremely robust |
| Transport | Premium travel case with custom-fit protective foam |
| Warranty | 2 years (for purchases made on or after January 1, 2023) |
Scope of delivery
 
| Position | Description |
|---|---|
| FK One Adjust machine | Fully assembled and ready to use |
| 2x batteries | 1x large battery (6.5 hours) + 1x small battery (5.5 hours) |
| Dual charger | Charging station for both batteries with LED charging indicator |
| Power cord | Special cable for charging station (use only this cable!) |
| Travel case | High-quality case with custom-cut protective foam |
| User manual | Detailed instructions for setup and maintenance |
Areas of application & fields of use
 
| Technology | Suitability | Advantages |
|---|---|---|
| Linework | ⭐⭐⭐⭐⭐ | Precise control thanks to adjustable stroke |
| Shading | ⭐⭐⭐⭐⭐ | Smooth transition from hard to soft possible |
| Color packing | ⭐⭐⭐⭐⭐ | Optimal saturation with minimal skin trauma |
| Portrait work | ⭐⭐⭐⭐⭐ | Finest nuances thanks to variable settings |
| Traditional | ⭐⭐⭐⭐⭐ | Powerful lines, then directly to shading |
| Realism | ⭐⭐⭐⭐⭐ | Perfect gradations without changing machines |
| Black & Gray | ⭐⭐⭐⭐⭐ | From deep black to delicate shades of gray |
| Guest Spots | ⭐⭐⭐⭐⭐ | Compact, securely packaged, versatile |
| Conventions | ⭐⭐⭐⭐⭐ | Wireless, long battery life, no setup hassle |
Operation & features
 
| Feature | Function | Benefit |
|---|---|---|
| Stroke Adjustment | Adjust stroke during operation | No interruption of the session necessary |
| Quick-Twist Battery | Battery replacement by turning | Replacement in seconds without tools |
| Power Disconnect | Deactivate battery during transport | No accidental switching on in the case |
| LED voltage display | Color-coded voltage display | See the correct setting at a glance |
| Click-grip adjustment | Adjust needle depth on the grip | Precise adjustment without dismantling the machine |
| 3-button control | Simple up/down/power operation | Intuitive control, no complex menus |
| Dual-slot charging | Charge both batteries simultaneously | Always have a full spare battery ready |
| Battery indicator | LED shows charge status | Blue = fully charged, no surprises |
Comparison: One Adjust vs. Standard Machines
| Aspect | FK One Adjust | Conventional machines |
|---|---|---|
| Stroke adjustment | Adjustable during operation | Machine replacement or cam change required |
| Setup time | Set once, cover everything | Prepare multiple machines |
| Flexibility | Unlimited – all styles with one machine | Limited to fixed stroke |
| Workflow | Uninterrupted | Frequent machine changes |
| Mobility | Wireless, 12+ hours | Wired or shorter battery life |
| Investment | A premium machine | Multiple machines for different techniques |
Universally applicable—designed for every style
The One Adjust was designed for versatility. It works independently as your only tool or integrates seamlessly into your existing FK Irons setup. From traditional linework to modern coloring to the finest portrait details, this machine masters every technique. Its adaptability gives you the freedom to tackle any project for any client.
Developed by professionals, built for professionals
Top artists worldwide have contributed to its development and confirm: The FK One Adjust has the potential to set a new industry standard. The ability to adjust the stroke length to your client's individual skin type makes the decisive difference between good and exceptional results. Artists report faster color saturation, fewer passes required, and thus reduced skin trauma.
Ergonomics meets American engineering
Designed, developed, and manufactured in the USA, the One Adjust embodies the precision and quality that FK Irons stands for. The ergonomic design ensures fatigue-free working, even during the longest sessions. Compatible with most standard needle cartridges, it integrates seamlessly into your existing workflow.
Why choose the FK One Adjust?
- Patented technology: Globally unique stroke adjustment during operation
- Maximum runtime: Up to 12+ hours of cordless power with dual battery system
- All-in-one solution: One setup for all techniques—from powerful lining to delicate shading
- Artist-approved: Developed in collaboration with world-leading tattoo artists
- Made in the USA: Premium quality and reliability you can count on
- Investment security: 2-year warranty and proven FK Irons quality
- Studio & Travel Ready: Perfect for your home studio and guest spots
- Time saving: Fewer machine changes = more time for tattooing
Ideal for:
- Established artists who want to maximize their efficiency
- Versatile tattoo artists who have mastered different styles
- Studios with a high volume of sessions
- Artists who frequently work at guest spots or conventions
- Professionals who value the highest quality and flexibility
The FK Irons One Adjust is more than a machine—it's a game changer. It gives you the tools to work at the highest level without being limited by technical constraints. If you're ready to expand your creative freedom and maximize your efficiency, the One Adjust is the machine you've been waiting for.
Quality promise
Since 2007, FK Irons has stood for innovation and precision in the tattoo industry. Founded by Gaston Siciliano, a tattoo artist and design engineer, the brand has become synonymous with uncompromising quality. Every machine is manufactured to the highest standards and undergoes rigorous quality controls. The result: machines that work as hard as you do.
Experience what is possible when innovation meets craftsmanship. The FK Irons One Adjust – built to adapt, built to perform, built to work as hard as you do.
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