This T-square ruler with aluminium fixed head is suitable for creating horizontal or vertical lines perpendicular to your page. Its 2-inch-wide blade is constructed from instrument-grade aluminium attached to a durable plastic head. One edge is graduated with the first inches in 32nds, thereafter in 16ths and the other edge in centimetres. It also features a hang hole for convenient storage. An excellent tool for inking and drafting that artists, designers, architects, engineers and students will love.