Plaster + wood board - which plug

[Peter2400]

Where can I find those? I searched on K Rauta online but didn't find any.

B-tema has them, http://www.biltema.se/sv/Bygg/Fastelement/Gips--och-skruvankare/Skivexpander-2000018837/

 

[SBH]

Where can I find such items? I searched for k rauta online but didn't find any.

There are both six and five mm double gypsum at k rauta.