Marshalltown 146 Concrete Float, Magnese, 20" x 3-1/8"Highlights : Size: 20" x 3 1 8" Extruded from very hard, durable, lightweight magnesium Comfortable wood handle is positioned to give the tool perfect balance Handles are secured with torque pad screws that will not backout Assists the user in preparing the surface for troweling Recommended for use with air entrained concrete produces a smoother finish than wood