On Wednesday, July 8, 2020 at 12:31:00 AM UTC+2, wrote:
On Wednesday, July 1, 2020 at 8:34:04 PM UTC-7, Jeff Liebermann wrote:
On Wed, 1 Jul 2020 10:57:13 -0700 (PDT), Lou Holtman
wrote:

Fits into the hollow axes of the GRX crankset and is held by a magnet:

https://photos.app.goo.gl/hJcKwKxXXKRo6eyS9
https://photos.app.goo.gl/sSganYNLo3a5R3SG6

Lou

Nice:
https://www.allinmultitool.com
https://www.singletracks.com/mtb-gear/multitool-fits-inside-crank-spindle-adds-bike-chain-breaker/
68 Euros.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Having ridden a great deal of gravel in my time I can't figure out why the GRX cranks would be set-up for cyclocross rather than gravel.

I'm not sure what you mean but my Ultegra crankset on my crossbike have 46/36T chainrings and the GRX crankset on my gravel bike 48/31T chainrings. I think both cranks are suitable for both kind of riding. It is all about the cassette. I have a lower gear with the GRX crankset combined with a 14-28 cassette than I have with my Ultegra cross crankset with a 11-32 cassette and the 14-28 cassette has smaller jumps betweem the gears. I think the GRX crankset makes a very nice gear set up.

Lou