Kapro 215 Stainless Steel Layout and Marking Chalk Line, Plumb Bob Design with 100-Foot Detachable Level Line Plumb-bob design with tough stainless steel casing and rubber molding Detachable line level clicks into chalk line Extra fast rewind (6:1) with string lock mechanism All-in-one end hook holds on nails and ledges, tacks into drywall Neat hook storage