Thrilling roller mat users - how to dismantle it

[Abhishek]

Hi ,

Any thrilling roller mat users out there that can help me to dismantle the unit so that I can take the drum out and clean inside of it ?

I have tried to turn the screws but to no avail . Do you use a wrench and if so what’s the size ?

Am talking about these screws

 

[Abhishek]

Anyone ?