JIS screwdrivers, the now defunct Japanese Industrial Standard screw type,

I believe still used in derraileur adjustment screws
My M8000 derailleur has hex bolts fitted, looks like they’ve updated the design.

Got a stack of rubbish 27mm sockets at work, various sizes and origins. Land Rover, tractor and dumper wheels amongst other agri’ stuff. Wheels rarely come off on the big stuff, so generally require an 8′ bar and a combined 30 stone.

Re the JIS screws….

That explains so many chewed up screw heads over the years! 👿

Never heard of it before this thread!

Re JIS screwdrivers the model I have is the ‘Vessel Megadora 900 Series JIS Cross point No 2 x 100mm’ which fits the JIS screws used on bikes very nicely.

Hozan for the win!, this is a Hozan D-332 2-100, very secure fit in B-Tension screws as they seem to lock themselves in to the machine screw heads and also very handy for fettling Honda Ride-On lawnmowers/ motorbikes etc…..

Heh, my motorbike’s carbs had JIS screws. Really soft JIS screws. I always assumed it was Mikuni’s revenge for Hiroshima.

Nah, they were invented for the benefit of Japanese/Honda technicians

Customer : “dunno what’s wrong with it?, it just started playing up for no reason whatsoever”

Honda technician : “you’ve been **** about with this again haven’t you”