MySit Fix Sinking Office Chair, Chair Saver Kit, Office Chair Saver Universal Size 25mm-28mm for Stop Sinking Height Adjusting - No Cylinder Replacement, No Tools Required - 2 Pieces

Worked great! Easy to use, quickly removed the tilt plate from the piston stem.

使えました。代替えになりそうなものがなくて助かりました

My 11-year-old Steelcase Leap V2 chair’s gas cylinder finally gave up. After ordering a replacement, I initially tried removing the old cylinder using the pipe wrench method. My smaller wrench didn’t work, so I bought a larger 24" pipe wrench—but that didn’t work either. I even used my floor jack’s pry handle over the wrench’s threaded section to get more leverage, but still couldn’t get the cylinder out.This tool was a last-ditch effort.When it arrived from Amazon, the packaging had a small amount of surface rust on a few of the screws. A bit of WD-40 and a paper towel took care of that easily. One of the threads didn’t look cleanly cut, and threading one of the tension screws felt a little too tight. I added a drop of silicone oil and carefully worked the screw in and out until it moved smoothly.Once prepped, installing the tool onto the chair was straightforward. The unthreaded collar goes against the seat base and stays loose to allow tension buildup. The threaded collar sits below it, and tightening it applies upward force to separate the seat base from the cylinder.The process was quick and easy. I gradually applied about a quarter turn to each tension screw until the seat base popped off—no drama, nothing fell, and there was no splintering or damage to either the seat or the gas cylinder. I’m honestly impressed. If I had found this tool earlier, I could have saved myself $50 on monkey wrenches and a lot of frustration.This is definitely a tool I’m keeping in case I ever need it again!

So I had a 20 year old computer chair that I'm deeply attahced to that needed a new gas lift... Because I don't like the new style "mesh back" chairs, I was determined to save it. I ordered an inexpensive new gas cylinder off Amazon and was ready to get to work! Of course, the old cylinder came out of the wheel base easily enough, but absolutely refused to come away from the chair mechanism. I tried everything before this thing:- Excessive amounts of strong language- Lots and lots of WD 40- Repeated applications of PB Blaster- Lots and lots of pounding with a rubber mallet and actual hammer- Heating and cooling with a propane torch repeatedly, hammering and prying with a pipe wrench- [Safely] Depressurizing the old gas cylinder, cutting off excess bits and then trying to saw and drill it out!!!None of it worked!!! The thing just would not move at all!My last resort would be to slowly and carefully hacksaw the thing out, but fortunaly this apparatus saved me the trouble! That said, I DID have to modify the procedure a bit:There are two rings - one that you clamp tightly to the gas cylinder, and one that is loose with jackscrews. The idea is that the jackscrews push on the clamped ring, pulling the cylinder up and away from the chair mechanism. I'd cut the cylinder shaft short (see photo), and while both rings DID still fit, I found that the clamping ring was slipping on the shaft and thus nothing was happening. I ended up drilling a hole through the remains of the cylinder, sticking a thick screwdriver through it, and then used the jackscrew ringdirectly against the screwdriver shaft and chair mechanism. It scuffed the paint on the chair mechanism a bit, but who cares! The old cylinder was worked free, I didn't have to waste my life hacksawing it out, and now I'm back in my classic chair!

The original gas cylinder for my desk chair was worn out, hopelessly stuck, and was not going to budge. After watching numerous YouTube videos and trying multiple tools (pipe wrenches, channel locks, mallets, etc.) I was ready to throw the chair in the trash and start over. Thankfully I read about these removal tools online and decided to give it a try. This sturdy gadget worked flawlessly and my replacement cylinder was installed in no time. I'm going to label this thing and keep it for another day, because gas cylinders eventually wear out. Highly recommended!