[tlug] "Cage nut tool" in Japanese?

[Raymond Wan <rwan.kyoto@example.com>]

Dear all,

Sorry, not really related to Linux, but maybe someone here 
who administers servers might know.

On my next visit to Japan, I'm thinking of trying to find a 
"cage nut insertion tool".  That is, the tool used to add 
(ideally, remove also) cage nuts into server racks.  I broke 
one screwdriver already and my fingers hurt from trying...

I know there are many types, but the simplest is just a 
piece of metal.

I'm having a hard time finding it here since most computer 
shops sell things for the average home/small office consumer.

Does anyone know what it's called in Japanese?  Or even what 
kind of store would sell it?  This isn't the type of thing 
that Bic Camera or Yodobashi Camera would have, I guess?

Thanks!

Ray

PS:  Amazon USA has it.  Some ridiculously expensive ones, 
but it has them.  I guess Amazon Japan might have it too, if 
I knew what it's called.