Titanium Rolling Measurement Ring - Curved Ruler for Fingertip， with Logarithmic Ratio/Natural Ratio, Irregular Curves/Straight Lines Can Be Measured, for Measuring Length
【Smart and fun decompression play】 The smooth and solid texture allows you to get a moment of tranquility and relaxation in the fast-paced social life every time you flip and play.
【Fashion pendant】 With a pendant rope, 120g weight, light and portable, elegance at your fingertips.
【Measuring mode】 The slide rule is composed of two moving circular rulers, one side is engraved with a logarithmic ratio and the other side is a natural number ratio. Irregular curves/straight lines can be measured, and you can play addition, subtraction, multiplication and division in a fun way.
【Usage】: Fix the inner ring and turn the outer ring to transform it into a simple circular ruler. It is very suitable for construction sites, fun classes and other occasions. It has a simple and elegant appearance design and gift box packaging, suitable for giving to friends or boyfriends.
【Fashion pendant】: With a pendant rope, 120g weight, light and portable,elegance at your fingertips.
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