This FatMax chalk line, which can be used vertically as a plumb bob, has the following features:-
Sliding door for quick and easy refill.
Metal crank which fits into the case for easy storage.
stainless steel end hook for added durability and rust prevention.
Patented chalk view window to see how much chalk is left.
3.5 : 1 gear ratio - rewinds 3 times faster.