HI
Bought a Vic fast sharpener 7.8715, very useful tool.
This one is often recommended for kitchen knives and that category, it can also be used on Swiss Army Knives.
Tryed a 91mm and a 111mm both with plain edges with very good result.
Also the beltcutter with wavy edge got a swing and its back to factory sharpness
From before i had heard about the Tungsten or Wolfram Carbide that is 8,5-9,0 on Mohs scale for hardness. The 7.8715 has Cemented Carbide or Tungsten Carbide Cobalt that is considered to be one of the absolute hardest metall from Powder Metalurgical.
The handle is very comfortable.
There is a sharpener 7.8714 that looks like this but is much smaller 68mm or so that is for SAKs. That is a new product from Vic
NM