This socket set is a great addition to your tool kit, it comprises of:-
3/8x21mm spark plug socket
3/8x3" extension bar
1/4"Mx3/8"F adaptor
3/8 spin disk
3/8' ratchet handle
1/4" spinner handle
14x1/4 metric sockets (4, 4.5, 5, 5.5 ,6, 6.5, 7, 7.5, 8, 9, 10, 11, 12 & 13mm)
3x1/4 sockets (1/4, 5/16 & 3/8")
2x3/8" metric sockets (15 and 16mm)