2 Pieces Plastic Ruler: This plastic ruler cover is made of high-quality BPA-free plastic, non-toxic and odorless. Reusable to ensure longevity. The measuring range of the ruler is 30 cm, the width of the ruler is 2.5 cm and the thickness is 0.2 cm. Dimensions 31 x 2.5 x 0.2 cm. Double-sided Scale: The scale has an inch and centimeter calibration function, one side is a centimeter scale and the other side is an inch scale. Whether drawing or measuring, it is flexible in most cases. With the fixed end, you can easily draw horizontal straight lines. Easy to Calibrate: The ruler is made of high-quality plastic. You can see the underlined annotation so you can draw and check the measured length. The ruler has a high-quality T-shaped plastic tip on the top for easy calibration. Convenient Hanging Hole: This T-shaped ruler has a hole in the tail for easy hanging. You can find a hook or nail right after using it. It doesn't take up space, and its prominent location makes it easy to use. The material is lightweight and won't add any extra weight to your fishing hooks. Practical Tools: Comes with 1 mini measuring board. The transparent ruler with black marker is suitable for engineers, architects, students, draftsmen, artists, etc., a good helper for your work and study. With a ruler that's built to last, you won't have to buy a ruler anytime soon.