@Bernhard there's a close-up of that piece at around 4:58......but even so I've never seen one before. It is pretty clear what it does, but I've never seen one.

That's a good video btw

I had the pleasure of sharing a hotel with Team Belkin once, during the TdF. They were obsessive about cleaning.....and lots of hosepipes were in evidence. A shame I didn't pay more attention to the brushes they were using.

But I have to admit I'm semi-surprised they bother cleaning things like chains....I'd have thought the pro teams would just use a new one every day. Cost-cutting seems to get everywhere!

Yeah, it seems like a very handy not so expensive tool

I think that they maybe don't really trust new chains, because there is always a risk of failure with a new one?

and it is probably easier to clean this way than replace

I've heard the 11-speed chains can be difficult to work on because the margins are so small, but with power links these days.....

I must admit I generally take my chain off altogether to give it a deep clean, but I only do that a couple of times a year. Of course what he does on the vid is far quicker (and less complicated if there are multiple bikes)

@Bernhard it is a Morgan Blue Chain Keeper. Appears to be widely available in UK online bike shops, at a cost of only GBP5 or so. €7 or 8? I've put one in my basket, next time I place an order.....

(I'm assuming you're in €-land !)

The blurb on Wiggle suggests a variety of uses (transportation, storage) where it is useful, not just cleaning.

I've heard of Morgan Blue but never used any of their products. Are they any good?

I have on occasion been quite intimate with Morgan Spiced (drink-brands.com/drinks/alcoholic-drink/…) but I suspect these are stories for a different chatroom...

Wow, you found it, that is really nice

Found one in Dutch shop for 5.50

@PeteH similar things often come with new bikes so you may be able to get a free one. Albeit push in rather than bolt in, but they're easy to modify to make them work better.