Raise your hand if you have ever worked on a Japanese product and totally stripped out the head of a Phillips fastener. I raised both hands. I recently found out why I stripped them out. Because they aren't Phillips screws. They are JIS.
Japanese Industrial Standard fasteners look almost like a Phillips, but are totally different inside. Here are two links with pictures and drawings and descriptions of probably the same thing happening that has happened to us:
https://www.webbikeworld.com/jis-screwdrivers/
https://revlimiter.net/blog/2014/09/...-screwdrivers/
Sorry that both links kind of turn into sales pitches for tools. The amazing thing to me is that only a few companies make JIS drivers. With several million Japanese made vehicles being sold in our country every year. One would think that Snap-On or one of the other big tool places would at least offer a single driver. Not that I could find they don't. I asked my Snap-On Industrial rep about them and he said he had never heard of them.
Not in any way M715 related, but I would imagine each of us have something with JIS at home. Car, generator, lawnmower, boat, motorcycle, etc... Think about how many times a stripped out JIS fastener on something has been replaced with a metric Phillips from the local hardware store because we didn't know better.
Now we know.