Review on IRWIN Tools Magnetic Level 1794482 by Gary Perry

Great for leveling fence posts, simply lay on the post at about eye level for good visibility and secure the elastic around the post and also around this unit where the elastic attaches to this magnetic aligner. Stay in place and hold it there, make sure the bubbles are always between the lines and take your time in the middle while setting your posts in cement or whatever whatever you do to make it work great as advertised!