This Ampad® Computation Book offers premium graph-ruled sheets in a durable spiral notebook. Pages have top and side margins on grid-to-edge graph ruling to provide scale and structure for technical drawings. Numbered pages help you navigate notes. Pressboard covers make this format ideal for student or professional use. Pocket-Sized Indicator: No; Book-Binding Type: Wire-O; Book-Binding Details: Twin-Wire; Book-Binding Edge: Side.