Qualcuno di buona volontà e competente puo' dirmi se queste due pietre fanno quello che io voglio che facciano?

Ovvero sono efficaci al fine di affilare un rasoio a mano libera?
Sono vendute su ebay dal polacco, al prezzo di circa 55 Euro
Gia' possiedo le tri hone Arkansan, perfettamente inutile per affilare rasoi, forse la piu' fine potrebbe servirmi per operazioni preliminari, ditemi voi.
Grazie in anticipo
Set of 2 razor hones, ceramic 8000 grit + natural 12000 grit
NUMERO OGGETTO 130837118299
Ceramic Sharpening stone
Whetstone / Water stone
It is very hard , and it gives a really fine polished edge.
Manufacturer : ELSASS NSI De Maas (Germany)
Size : 170 x 50 x 18 mm
Grit : 8000
(FEPA 1200= 3 micron)
lapped on one surface
Each stone is supplied with a ‘slurry stone’ are made of by the same material
+
This is a new Chinese Hone or waterstone, used for final polishing of straight razors and similar items like woodworking tools.
It is approximately 12,000 grit size.
The stone comes from the Guangxi province of China.
It measures 150 mm x 50 mm x 16 mm in depth . Stones are cut by hand, dimensions may vary slightly.
hone cut from one solid piece
Stones are carefully selected and cut but due to their natural origin differences in visual appearance might occur.
Any such differences do not impair the stone function in any way
THESE ARE SAMPLE PHOTOS different shades are possible
PLEASE CONCERN MORE BEFORE BUYING
Each stone is supplied with a ‘slurry stone’
It is an extremely fine stone
It is very hard - almost like ceramic, and it gives a really fine polished edge.
It is a slow stone, requiring 50 - 100 laps to polish the edge of a straight razor, but the results are superior smoothness - sometimes likened to a "buttery" feel.
lapped on one surface