Graph Front, Ruled Back: These graph paper pads 8.5 x 11 carry a 4 x 4 quadrille grid on the front of every sheet and a narrow rule on the reverse, so the drawing and the notes that explain it share one pad. Tears Off Clean: A Letr-Trim perforation runs the full width, so a finished sheet leaves the graph paper notepad with a straight edge instead of a ragged one you would have to trim before it goes in a file. Firm Writing Surface: A 60 pt reinforced chipboard back holds this grid legal pad steady on a lap, a job site or a car seat, and the hinged burgundy cover closes over the top sheet to keep your work private. 80 Sheets, 160 Usable Pages: Both sides of all 80 sheets are ruled, so these note pads give twice the writing surface of graph paper pads and grid paper pads 8.5 x 11 that are ruled on one side only. Engineers, Students and Makers: Ruled like drafting paper and sized like a legal pad, this graph paper legal pad handles lab work and homework as readily as floor plans, quilt blocks and garden beds.