Stanley Power Winder Chalk Line with a stainless steel hook for added durability and rust prevention. It has an ergonomic design, holds 30m of string and has a 45g chalk capacity. The weight and style combination provides an excellent plumb bob facility. With a high impact ABS case for durability, a 3.5:1 gear ratio which rewinds faster and a metal crank which folds into the case for storage.