The Kapro POSTRITE water level is especially great for installing pipes, posts, signs, and other vertical stuff. The POSTRITE spirit level has three compact, easy-to-read vials that make it simple to align things to the position you want.

You can hang it around posts and frames either by hooking it onto a nail or using the included strap. Thanks to the magnetic surface, you can also attach it to metal surfaces without any extra fasteners.