MySit Gas Lift Cylinder Removal Tools 28mm/1.1-Inch, Removal Tools Sets for Replace Office Chair Cylinder, Fix Sinking Office Chair Stainless Steel Chair Saver for Stop Sinking - 2 Pieces

Life saver. But would love a larger one to disconnect the piston from the wheel base. I thought I’d never get that thing off.

Easy to assemble and to use. Saved me from having to replace my gaming chair as I couldn’t remove the lift cylinder and wheeled base without it. I tried everything like WD-40, PB Blaster and a hammer with no luck. 5 mins later after installing this tool to the lift cylinder, it was removed .

I purchased a Steelcase Amia Office chair and it did not work out, so I needed to return it. There are no instrutions on how to disassemble the chair on their website and their customer care is nonexistant. I found out about this little device on Reddit. WORKS LIKE A CHARM. I was able to remove the cylender from the chair (seat) and the wheel base no problem all without damaging or scratching the metal. All you need is this tool and a rubber mallet. EXCELLENT PURCHASE.

Great tool, great value for the money, very well built, fit perfect. Easy to use.

Saw horror stories on reddit of this process taking hours and full of frustration. Took in total 15 mins to replace the gas strut in my chair. Very pleased!

Got the job done!

I tested it, it works.

Consider this a single use tool, the screws are so cheap once you get them tight enough to grip the shaft so it doesn't slip when you try to pull the piston, the screw heads start to strip and you can't get them back out of the collar after the piston is out. You might be able to drill out the screws and replace with better ones but my advise is buy a different version.