Twisted Mason Twine is used to quickly and accurately ensure mason is level. It is rot proof resists oil gasoline and most chemicals. For contractor carpenter mason or home use. Brand Name: Stringliner Fill Weight: 0.5 oz Product Type: Mason Line and Reel Line Length: 540 ft. Line Type: Twisted Line Material: Nylon Case Material: Plastic Loaded with quality 18 nylon line For carpenter mason and steel workers Dry line reel Rewind with hand crank or use power screwdriver Line reel made of durable polyethylene Line secures in convenient notch