SC/2 contains:Size range:- 3, 4, 5, 6, 8, 10 and 12mm.
SC/4 contains:Size range:- 6, 7, 8, 9, 10, 12, 14, 16, 18 and 20mm
SC/12 contains:Size range:- 1/4, 5/16, 3/8, 7/16 and 1/2''
SC/17 contains:Size range:- 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4, 7/8, and 1''
SC/22 contains:Size range:- 1/4, 5/16, 3/8, 7/16 and 1/2''
SC/27 contains: Size range:- 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4, 7/8 and 1''