Socket set

A socket set, including:

• a first socket, having an inner circumferential surface and an outer circumferential surface, the inner circumferential surface defining a first driving portion and a second driving portion at two sides of the first socket, a first driven portion being formed between the first and second driving portions, the first and second driving portions being adapted for driving a screwing member, the first driven portion being adapted to be driven by a driving rod having a driving head, and the outer circumferential surface formed with a polygonal engaging surface;
• a second socket, having an inner circumferential surface and an outer circumferential surface, the inner circumferential surface defining a third driving portion and a fourth driving portion at two sides of the second socket, a second driven portion having a different size than the first driving portion being formed between the third and fourth driving portions, the third and fourth driving portions being adapted for driving a screwing member, and the second driven portion being adapted to be driven by a driving rod having a driving head;
• and
• a combination mechanism,
• wherein the polygonal engaging surface is adapted for being received in the third driving portion, the first and second sockets are in a cooperative-motion relationship, and the combination mechanism includes an engaging element and at least a first recess to retain the first and second sockets in a corresponding position.