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SKU: FK1-ST-3.0
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$649.99
FK1-ST-3.0
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23 available
FK1-ST-4.0
65 available
FK1-GN-3.0
10 available
Reimagine daily versatility with a machine that handles everything. Building on the fan-favorite features of the OG machine, the FK One Update is designed as a true all-rounder for artists who don’t want to switch machines mid-flow.
Power through longer sessions with upgraded batteries. Dual rechargeable batteries (18500A & 18650A) give you flexibility and endurance, with up to 5.5–6.5 hours per battery depending on configuration. Plus, the battery housing comes with a refined 1.1” digital LCD display so you can clearly see your voltage and all your settings at a glance.
Say goodbye to fatigue with unmatched ergonomics + efficiency. Weighing in at just 215g (233g with battery), the FK One Update is built for control without heaviness. It integrates seamlessly with Ergo Shield grips, cutting setup time down to seconds while improving comfort during long sessions.
Choose the stroke that’s right for you. The FK One Update comes with a 3.0mm or 4.0mm stroke according to your preference. Voltage adjustment in 0.2V increments allows micro-level control, while an operating range of 5–12V gives you real flexibility.
Technical Specifications:
Weight: 215g / 233g (with battery)
Length: 126mm / 134mm
Max Width: 38mm
Stroke: 3.0mm & 4.0mm fixed
Voltage: 5–12V (0.2V increments)
Hertz: 80–180Hz
RPM: 4,800–10,800
Motor: Brushed coreless motor
Battery Capacity: 2000 mAh / 3300 mAh
Battery Life: 5.5 hours / 6.5 hours per battery (up to 12 hours combined)
Charge Time: 2h / 2.5h max
Display: 1.1” LCD screen
Battery System: Dual rechargeable (18500A & 18650A compatible)
Compatible with Ergo Shield Grips
The following webchart is a quick reference guide for standard body jewelry measurements and how to measure basic body jewelry. Please print this webchart to help measure your body jewelry accurately.
JPG (300 KB)
Visit our PainfulPleasures Infocenter for additional body jewelry information. There, you will find detailed articles on standard body jewelry sizes, how to measure body jewelry, basic body jewelry, and more.
Ensure compatibility between standard (non-custom) PainfulPleasures body jewelry parts using the tables below. More information on threading, including custom thread patterns, can be found in our Threading Infocenter article.
Internally threaded jewelry has a threaded post on the top and/or end, which is then inserted into a threaded hole in the barbell shaft.
Gauge
18g, 16g
14g, 12g
10g–00g
Internal Thread Pattern
0.8mm or 0.9mm
1.2mm
2.0mm
Externally threaded jewelry has a threaded post on the barbell shaft, which is then inserted into a threaded hole in the top and/or end.
14g, 12g, 10g
External Thread Pattern
1.6mm
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Built on a proven platform and refined for today’s artist, the FK One delivers the control, consistency, and performance that define FK Irons.
Precision matters. Monitor battery life, adjust voltage, and stay focused with complete visibility over your machine settings.
Everything you loved about the original. Refined with the features artists asked for and built to perform at the highest level.
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