This is an aluminum ruler suitable for stained glass making and other similar crafts. It has a comfortable weight and shape that fits well in the hand, making it easy to use. The top and sides are made of a material that allows a glass cutter to slide smoothly, while the back is made of a non-slip material that fits the glass. The rubber on the top can be used for tasks such as breaking glass. Please note that it expands in the summer and contracts in the winter. While a regular cutter can also be used, please be aware that it may scratch the ruler. Please see the images for stains on the back. Effective length: approximately 59.5 cm Width: approximately 7 cm There are no scratches on the parts that affect the work. Thank you for your understanding. Length: Approximately 59.5 cm Width: Approximately 7 cm Thank you. #AluminumRuler #GlassCuttingRuler #StainedGlass #Ruler #Hobby #Tools