Finite Element Cerapuc

Hello

Anybody here with experience in use of Finite Element Cerapuc in your system ?
I am about to understand/use those so I am consulting you for this.
I saw in stock pictures there are some bolts & nuts associated. What are those for? How to use those bolts & nuts ?
In accessory package there is something with the shape like a screw driver. What's that for ?

Thanks! Rick