This Goldblatt Braided Nylon Mason's Line with Winder is a high-quality construction tool that will help you to achieve perfect lines and levels on your concrete projects. The twisted nylon material provides excellent strength and durability, making it ideal for use in tough conditions. The bright yellow color ensures that the line is highly visible, even in low light conditions, and the 350 ft. length means that you can cover a large area without having to constantly reposition the line. Made in the USA, this line is built to last and is a must-have for any serious construction worker.