This chalk line has an ergonomic design, with a high impact ABS case for durability. It has an on-board hook storage, a crank which folds into the case for storage and a sliding door which allows for quick and easy refill (30g. Chalk Capacity). It has a stainless steel end hook for added durability and rust prevention and can hold 30m of string. Consists of 113g blue chalk and line level.