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Three working widths are available, from 60 to 84 inches. A heavy, welded mast and 4x4-inch tubular steel frame deliver added strength and rigidity. Operator's manual container concealed within mast for added protection. A formed, upper moldboard edge increases rigidity. Moldboard thickness is 3/16-inch for RB2060 and 1/4-inch for RB2072 and RB2084. Adjusting the angle is easy. Simply remove the steel pin and rotate the blade to the desired setting, or swing it around for backfilling. rugge