This plastic ruler set is made of high-quality BPA free plastic material, which is non-toxic and odorless. Reusable and with a long service life. The measuring range of the ruler is 12 inches/30 centimeters; The ruler has a width of 3 centimeters and a thickness of 0.2 centimeters; Size: 31x3x0.2 centimeters. [Double sided scale]: At this moment, the scale has both inch and centimeter calibration, with centimeter scale on one side and inch scale on the other side. Both drawing and measurement are flexible in most cases. The fixed end allows you to easily draw horizontal lines. Easy to calibrate: This ruler set is made of transparent plastic and features underlined annotations, making it easy for you to draw and check the measured length. The top of the ruler has a high-quality T-shaped plastic head for easy calibration. Convenient hanging hole : This T-shaped ruler has a convenient hanging hole at the end, which allows you to directly find the hook or nail after use. It doesn't take up space and is easy to use due to its obvious location. This material is very lightweight and will not add any extra weight to your hook. Practical Tool : A transparent ruler with black markings is suitable for engineers, architects, students, draftsmen, artists, etc. It will be a great assistant for your work and study. With a durable ruler, you don't need to buy another ruler in a short period of time. standard: The packaging contains two T-shaped square rulers Each item size: 31cm x 3cm x 0.2cm Color: Transparent Material: Plastic The packaging includes 2x T square ruler