Because there are so many types of leveling staffs, Haefeli Lysnar stocks a comprehensive range to suit professional circumstances and preferences. Essentially a staff is a graduated wooden or aluminum rod, used to assist in determining differences in elevation. Rods can be one piece, but many are sectional and can be shortened for storage and transport or lengthened for use. There are many types of staffs, with names that identify the form of the graduations and other characteristics.