Two is better than one! These 3" line levels' lightweight design reduces line sag, for an accurate reading every time. They are also highly durable thanks to their impact-resistant Structo-Cast® construction and feature unrestricted hooks that allow for easy movement. The impact-resistant Multi-Pitch® vial also reads slope in 1/8" per foot increments. Features Durable level vial is impact resistant Lightweight construction reduces line sag Unrestricted hooks allow for easy movement on line Use for masonry, landscape and sheet metal work Multi-Pitch® vial reads slope in 1/8" per foot increments