i recently purchased this ruler from the "Measure & Inspect" category in the "Industrial and Scientific" section .Based on my observations, I can say that this ruler is a valuable tool for dimensional measurement. It has clear markings that are easy to read allowing for precise measurements. The transparent design also makes it easy to align the ruler with the object being measured. The only downside to this ruler is that it is quite thin and may not be as durable as some other rulers on the market..