FK One Adjust Wireless Tattoo Pen Machine
FK One Adjust Wireless Tattoo Pen Machine
Availability: In stock
The FK One Adjust is engineered for artists who demand freedom, precision and consistency in every session. Designed and built in the USA, this wireless pen-style machine combines the compact feel you love with serious performance under the hood.
With a patent-pending adjustable stroke mechanism (2.0mm–5.0mm in 0.5mm increments), you can adapt from crisp lines to soft shading to bold colour packing - all without changing machines mid-session.
A digital display shows your actual output in volts or hertz, giving you real-time performance feedback under load, so you always know exactly how your machine is hitting.
The weight is approximately 244g with the 18500A battery and 268g with the 18650A battery, both easily drop-in, designed for reliability during long sessions.
Built with aerospace-grade aluminium and powered by FK Iron’s signature motor system, the FK One Adjust delivers stable torque, smooth hits, and a balance that keeps you going hour after hour. Choose one machine and let it do multiple jobs.
Why Choose the FK Irons FK One Adjustable?
• Full adjustable stroke range: 2.0mm–5.0mm in 0.5mm increments - switch techniques mid-flow.
• Wireless drop-in battery system (dual caps for 18500A or 18650A) - clean setup, no tangled cords.
• Digital display shows volts or hertz - you control performance, not guess at it.
• Ergonomic pen-style frame, lightweight and built for long sessions.
• Precision-engineered USA assembly - reliability you can count on.
Technical Specifications
·       Stroke Length: 2.0mm–5.0mm (adjustable in 0.5mm increments)
·       Voltage Range: 5V–12V with fine adjustment (0.2V)
·       Battery Runtime: Approx. 5.5 hours with 18500A short cap; approx. 6.5 hours with 18650A long cap
·       Weight: Approx. 244g (8.6oz) with 18500A; approx. 268g (9.5oz) with 18650A
·       Machine Size: 152mm x 38mm
·       Material/Body: 6061 T6 aluminium shell (aerospace-grade)
·       Display Type: Digital screen showing volts or hertz; ambidextrous orientation
·       Battery Type: Dual drop-in Panasonic 18500A & 18650A batteries included
·       Stroke Adjustment: Tool-free, mid-session stroke change via ring or twist mechanism
·       Compatibility: Compatible with standard cartridge systems; modular grip options
Standard European Delivery
Standard European Delivery across the Netherlands, France, Belgium, Austria & Germany is normally 2 to 3 working days. Standard delivery to Italy is 3-5 working days.
Next Day Delivery
Next Day Delivery is available across all these countries for all orders and free for any order placed with a value of over €250. Any order delivered to these countries with a value of under €250 will have a standard delivery charge of €6.99. Next day delivery across these countries is available for orders under €250 and is charged at €9.99.
Please visit each countries individual Delivery Overview pages for more detail.
All orders placed by 7pm (UK time) Monday to Friday will be despatched the same day providing there are no external factors beyond our control*.Orders received on Saturday and Sunday or Public Holidays will be despatched on the next working day.
Next Day Delivery in Denmark, Sweden Norway and Poland
Next Day Delivery is also available in these countries in the equivalent currency amount for the order value threshold. Certain additional weight factors also apply for Poland and Norway. Please see your delivery options at the checkout for these countries.
Deliveries to rest of the world
Delivery outside of the countries listed above varies depending on the weight and destination but if you require an exact quote see your delivery options at the checkout.
Other important information
Duty Payments
Products delivered to some destinations, mainly outside the EU, may be subject to taxes, fees, levies or other charges, which are imposed by local legislation. The recipient of the product is responsible for these fees, including import duty and customs duty which are generally requested by the carrier. By placing an order you are agreeing to this as a main term and condition.
Licences
Certain countries require recipients of our goods to hold relevant licencing. This is the responsibility of the consignee to ensure they have all necessary paperwork to receive their shipment. Should the consignee not be able to provide the required paperwork to local authorities to release the order no refund will be processed.
Special Products
There are a small number of special products that we do not hold in stock ourselves and order from the manufacturer at the point that you place your order. This is due to specific manufacturer processes. Special products that go through this process are highlighted on our site within their individual product descriptions.
Returns Policy
Barber DTS offer a comprehensive policy for unwanted or damaged goods. Please go to our Returns Policy page for more details.
External Factors beyond our control
Please be aware that on occasion due to external delivery factors beyond our control Next Day Delivery cannot be 100% guaranteed.
Hazardous Substances
Any orders containing restricted or hazardous substances are subject to additional transportation or Civil Aviation authorities’ rules and procedures which may cause a day in despatch and delivery.
Delivery options only showing chargeable services
If your order is under £25 in value (before VAT) but exceeds 2 kilograms in packed weight your order must be sent via UPS at an additional cost due to Royal mail restrictions.
Orders delayed at despatch
Sometimes there can be additional factors which means your order needs extra checks and administration before being released. On occasion this can cause a slight delay to despatch. Any orders containing restricted items for instance need extra checking before release.
Signature upon delivery
All parcels through our main courier will need to be signed for and can be delivered anytime between 8.30am and 6.00pm. Timed Deliveries and Saturday deliveries may be available at an extra cost.