• Helps reinstall the negative sealhead on Fox Float air shafts (NA / NA2)
• Fits 10mm air shafts only
• Compatible with Fox forks using NA and NA2 assemblies (Float 36, 38, 40, etc.)
• Ensures the negative sealhead presses on evenly during reassembly

Note: Required for Fox 38 NA2 rebuilds where the negative chamber is fully enclosed inside a press-fit cylinder. You cannot access the negative chamber without this tool.

This tool is 3D printed in hard, durable plastic and is hand-sanded to the correct diameter to minimize friction during sealhead installation. It isn’t as slippery as a metal tool, but it works flawlessly if you use proper grease and technique.

Pro Tip: Apply Slickoleum, SRAM Butter, or any light suspension grease very generously so the sealhead slides smoothly.

• How to Clamp Small Shafts
• Essential Tools for Any Rebuild

• This tool is for Fox air shaft service only. Not for other brands or damper shafts.
• Always release all air pressure before servicing any air spring.
• See our Terms of Service for full legal disclaimers.