I know that after Tls handshake happen, Two pairs of symmetric keys will be generated on client side and also on the server side. Those pairs of keys on client are:
1- client write key
2- client mac key
3- server write key
4- server mac key
and also the server has those keys. My question is which session keys are being used to encrypt and decrypt the transfered data between the client and the server.

I know that after Tls handshake happen, Two pairs of symmetric keys will be generated on client side and also on the server side. Those pairs of keys on client are:
1- client write key
2- client mac key
3- server write key
4- server mac key
and also the server has those keys.