17 piece deep metric socket set. Sockets are 120 mm long and deep broached for extra deep reach. Provides access to recessed areas with extra long bolts. Contains (Qty.) (1) 6 mm Socket, (1) 7 mm Socket, (1) 8 mm Socket, (1) 9 mm Socket, (1) 10 mm Socket, (1) 11 mm Socket, (1) 12 mm Socket, (1) 13 mm Socket, (1) 14 mm Socket, (1) 15 mm Socket, (1) 16 mm Socket, (1) 17 mm Socket, (1) 18 mm Socket, (1) 19 mm Socket, (1) 20 mm Socket, (1) 21 mm Socket, (1) 1/2" to 3/8" adapter, (1) 3/8" to 1/4" adapter.