This bahco chalk line has a 30 metre line of mixed orange nylon and cotton it has a breaking strain of 16kg and a high chalk retention in the cotton it can hold 50g of chalk allowing a long time between refills and has a 3 times rewind speed compared to other chalk lines in addition it features a claw and hook end and an integrated belt clip the specially shaped end means the line can be supported allowing it be used as a plumb bob