It is already narrower.
The stone is placed on a plastic support.
The adhesion of this support is made by 4 "studs" rubber but this system reaches these limits very quickly when the stone is moistened.
For me, there are very clear that the stone is twisted ... probably due to the stresses applied during bonding of two different grain stones. (I think this is not the case of all stones)
Still, I tried to use it.
FYI, I sharpens my knife about every 2 weeks or more frequently.
Grains 1000, not really comment ... pretty well and we get to have a correct edge.
By cons, for grain 3000, the surface is too hard and the knife wire "hooks" too rock.
Leaving streaks on the surface and makes almost unusable stone.
I have not managed to improve the cutting with the grain.
Too bad ...
