This listing is for 4 pieces of 5×5 steel base plates 5” x 5” surfaceWeight: 1.6lbs (25.5oz) Thickness: ¼” (6.35mm)Hole size: ⅜” (9.53mm)Distance from center hole to center hole vertically and horizontally: 4”5 gauge thicknessMade of high quality rolled steel These are weldable and paintable Shipping is charged only once per orderClick here if you need different sizes!