The Tracing Tray is used in conjunction with the Metal Insets, allowing students to set the inset frames in the tray and trace the shapes onto a piece of paper underneath.  The tray has two frames, allowing the student to work with two different shapes at the same time, and there are three grooves routed along with bottom edge for holding pencils, pens or crayons.  The two frames each measure 14.3 cm square to easily accommodate the Metal Insets frames.  Packages of tracing paper pre-cut to size are also available.