neat tool find
I thought I should carry these on rides but didn't till a couple of days ago when my 3-pin chain rings came loose and require a narrow wrench. The pouch is rubber-like plastic.
Ride heavy metal.
One of those came free with my purchase of a '76 Moto Grand Jubile. The pouch's material feels like old rubber hoods to me.
They came with every Mafac equipped bike.
Senator from Secret
I have a NOS that I bought on the bay... (it's no longer nos because I use it)
Still... very handy set to have on your French bike.