Abstract: A base is provided with right angularly disposed scales marked in degrees starting from zero degrees at an intersection of the scales. Indicators are elongate and pointed at their ends and each of different length. Placement of an indicator on the base in a diagonal manner with its ends on separate scales will indicate miter and bevel angles for a compound miter cut of each container panel. Each indicator bears a number to indicate the number of panels in a container having its panels cut using the compound angles identified by the indicator.