XAS0612/1 Single XAS Rope Clutch 6 ~12mm Multi role clutch for lines 6 ~12mm Perfect for today's cruising yachts up to 35 ft and racers up to 27 ft Why a good line size range is important : Lines will often be switched or replaced, or smaller stronger lines will be fitted. So, a bank of clutches should never be limited to a fixed diameter and type of line; having a wider range ensures your clutch is going to cope with your actual line, used or new.