JIS screwdrivers and all that bollocks

So no doubt you've read about JIS screwdrivers. If not the story goes that Japanese Industry Standard screws are what the Japanese use on their motorbicylmobiles. But Philips are pretty close and nobody notices. Posidrives are just wrong.

So I've read that as long as you push Philips are just as good.
So I decided to order some Vessel brand bits off EvilBay.

Well I took them into the garage and dabed some blue from a metal marker pen in the top parts of the slots.

Then I tried them in Different screws in an engine conveniently on the bench. Wow, they fit well. So I try the same size Philips I have. They fit well. But the difference is that I can wobble it around in a small circle. With the JIS ones, nowhere near as much. Huh!

So I try a tight screw, previously I'd decides I better break out the impact driver. Philips, fail. JIS, success.

OK I'm sold.

JIS screwdrivers and all that bollocks