C Span 

Perhaps our best invention ever, with imitation being the highest form of flattery.

SM 56053. The Original carbon and foam C.Span - it floats and it's very light weight. Specialist product for the serious weight saving pro.

Designed to suit the needs for pro and elite sailors across the world, we offer two further options to suit the Ronstan turnbuckles, in A4 stainless steel SK55017 8mm and SK55020 13 mm with numerous features and slots for all the locking nuts, lower's swage, 8, 10, 13mm bolts and a shackle key. 

The C.Span is pretty much your ultimate multi tool and would find a use in any bouyancy aid pocket in any class.