You ever had stuck spacers? New tool...

if these are 3d printed like some other ones, they do break kind of easily.

some spacers have slots for a "lens wrench"/"camera spanner wrench" but that only helps if you've put the adapter on right-side up (dont ask how i know)

Rubber grip gloves from Home Depot have never failed me. Still, this is a cool idea.

Chris White- Overcast Observatory:

if these are 3d printed like some other ones, they do break kind of easily.

some spacers have slots for a "lens wrench"/"camera spanner wrench" but that only helps if you've put the adapter on right-side up (dont ask how i know)

These look to be using a carbon fiber reinforced filament. I've done a ton of printing with PC-CF, PET-CF and even PETG-CF.   These materials are very strong and wont break under normal use.  These are beefy parts. You can use this stuff for light duty machine parts. 

It it was just PETG, which is what most people use then yes.. that stuff breaks easily. ​​

If josh sees this he can verify material.

yeah it does depend on the material, that is true. whatever is on scopestuff is very brittle.

Great idea.  A dab of lithium grease and strap wrenches have served me well so far, but this is a cool alternative!

Although the other suggestions can work much of the time , they still sometimes fail. I have tried the rubber faced gloves and strap wrenches and the rubber discs. They work for slightly stuck stuff but for threads that are really stuck, often from threads that were machined with too tight a tolerance, none of those will work. I have had a couple times over the 30 years that adapters simply had to be carefully cut off with a Dremel disc. Even letting WD40 sit overnight then using the above would not let those move.

The one manufacturer I mentioned that machines threads with too tight a tolerance requires silicone grease on every thread or they are pretty much guaranteed to stick and even that does not help maybe 25% of the time. I stopped using their adapters and order from Precise Parts instead - their thread relief is just right so they seldom stick.

As far as the standard measures mentioned, the length of the stuck adapter is often the problem. If the adapter is an inch long or more then strap wrenches and such can work but when you get down to 1/4 or 1/2 inch, things like strap wrenches will just not work since they will slip off the end (not just slip). That is where these appear to be better.

I do have to say I would rather see the handles made with metal  since the tougher stuck  cases I have seen would likely break even PETG-CF. I have printed things with both that and Bambu PAHT-CF (nylon) and based on how strong that is vs the tougher stuck adapters I have seen, I would be a bit concerned that they would break.

But I have ordered a set since, barring ones with metal handles, they look to be the best one can get at this time.

Hey, I've actually made a video on this! https://youtu.be/CSgFeSr6x9Y?si=26jWS-2E94Aqdj6g

My steps for stuck adapters is always bare hands -> rubber glove hands -> shoe method -> strap wrench -> put in freezer for 15 minutes and repeat those steps -> dremel slots and use lens wrench tool -> pipe wrench and buy a new adapter after

Tony Carro:
I ordered the tool.  Getting tired of going to garage to put adapters in vise and using water pump pliers with shop rag to get them apart.  I started using a little tiny dab of anti-seize on threads now to keep them slicked up.  Didn’t want to do that to my image train but it’s not getting on my imaging parts.    Will see how that works.

Use beeswax instead of anti-seize. It doesn't creep or liquify over time.

I’ve had these for a while now and have used them a few times. There are still some scenarios where the CF just doesn’t grip but most of the time, they work. For the slippery ones, I have some rubber jar openers that fit the bill.

its extra tough when working with 2mm spacers or those damned askar backfocus adjusters (that I no longer use on any of my rigs)