Product Description The Swanson Speedlite magnetic post level is designed to be used with wood or metal for difficult one-man jobs where hands-free work is a must. This tool is used to level and plumb posts, flagpoles, water pipes, railings and decksall with one tool! From the Manufacturer This magnetic post level has been designed for difficult one-man jobs where hands-free work is a must. This tool is used to level and plumb posts, flagpoles, water pipes, railings and decks - all with one tool! High-impact composite construction Strip magnets for leveling metal objects Hands-free plumb and level of posts, flag poles, water pipes, railings, and more Elastic attaches level to posts and poles for hands-free work 3 easy-to-read vials