This inexpensive hand level will satisfy most preliminary survey, excavation and road construction applications. Used to determine a horizontal line of sight. It is well balanced, accurate, and sturdy to give long life and dependable service at a low cost. All aluminum construction furnished in a durable vinyl case with belt loop. Length: 6″. Also available in 6″ with an overall length of 8″. This is known as the Warren-Knight Precision Hand Level (WK-40-1660).