Kluson is just a brand name now. They used to be a manufacturer of tuners but they went out of business and somebody bought the name and has other companies make the tuners for them. All of the Kluson branded tuners are decent but often you can get equal or better tuners for less.

Those look like pretty generic tuners, probably about the same quality as the stock ones on your guitar. I don't know what prices are like on your side of the ocean so I don't know if you're paying much extra just for the name. And I don't know the specs of your stock tuners so I don't know if those will fit.

Besides shaft diameter and shaft length, the mounting screw location is something you have to consider. There are many styles of tuners available -- some will match the current mounting screw location, many won't. Even if you're willing to fill the old holes and redrill, some will cover up the filled holes and others won't.

Also consider the body size and the knob size. Your tuners are crowded together and you need "mini" class tuners like the stock ones. Full-size tuners/knobs will be awkwardly close together (if they'll even fit).

The Thomann site doesn't list all the dimensions, but it looks to me like the knobs will come close to rubbing together if you cram 12 of them on that headstock.