I have those and I have to say they're really difficult to work with.
I've had issues using them on my RV-500, 3Leaf Groove Regulator, Source Audio Aftershock and the old Soundblox Bass Envelope Filter, and they even been tight with my ZVEX and MXR pedals where the power input is right next to a 1/4" input.
While they are flat the jacks are very wide and the part of the casing where the screws are adds bulk and makes them even more difficult to work with than they need to be.
If you have any pedals with effects loops or stereo jacks avoid these cables.
However Hosa themselves make another cable with very slim, low profile jacks.
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These seem to be the same width as the EBS Flat Patch cables but are much cheaper.
Donner also make a very flat and slim patch cable and they are the ones I ended up with on my board. They're very close to the Rockboard flat patch cables with the slim rectangular jacks. I've had them for two weeks and can vouch for how much space they save and how easy they are to work with.
https://www.amazon.com/dp/B07HC5XV1X/ref=cm_sw_r_cp_apa_i_4pPkDbJDM28XH
Each of these options are actually more low-profile than the Hosa IRG "pancake" jacks. Those are just so bulky for no reason.
Here's one last suggestion for space saving. I was considering these but ended up with the Donner cables for no particular reason.
https://www.amazon.com/MAKA-Profile-Effects-Right-Angle-Version/dp/B07JFQB4LP