This is a very rare item, hardly ever discussed here, so I guess very few people actually own it. I have only tried it out in the store, and as all Festool FastFix adapters it is build very sturdily, like you can kill an elephant with it if you throw it.
I tried it when I wanted a socket adapter but decided to go for the smaller and cheaper option of the Festool 495133 centrotec socket adapter which is easier for me. I use it very rarely, so I am glad I got this one instead of the FastFix version you ask about.
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