Simplifies yard grading, fence building and many other home, farm and commercial jobs requiring the establishment of accurate level points, sides or surfaces. 2 clear plastic tubes with shut off valve and breather caps attach to any garden hose. Operates on the basic law that water seeks its own level. Can be used indoors or out, around corners. Simple and easy-to-use. Packed 1 on card, with instructions on back. Mayes' Water Level attaches to any garden hose to accurately determine levels for driveways, lawns, fences, sills, ceilings, footings, and gradings. Best of all, there are no parts to break down or wear out. No matter what the job is, Mayes helps make sure it's done on the level. Mayes is committed to making the best tools for the skilled professional tradesman who demands the best.