Accurate design: our double scale plastic rulers are designed with precise scale range of 0-150 mm (0-6 inches), which can help you measure the accurate scale of different items without making too much efforts, they can show both two units of inch and cm, very convenient to use5 Pieces in total: there are 5 pieces tattoo eyebrow rulers in this package, sufficient quantity for your different usage and meeting your replacement needs, you can put one in your office as a calibrated scale, leave one at home to measure household gadgets, and the rest can be applied for running some outside errandsReliable material: these mini plastic calipers are made of plastic with an inlaid metal bar, which is light in weight, unbreakable and safe, convenient for your daily carrying, so they will do no harm to your body and can achieve a long time use, they are also comfortable to hold for its smooth surface, won't hurt your skinClassic color: the measuring ruler caliper measure tools are designed with classic color, not easy to be outdated, together with reliable quality, they can accompany you for a long timeWide application: this sliding gauge measuring tool is suitable for many people in different careers to use, such as brow artists to use in doing eyebrow tattoo, students in math problems, engineers in their projects, and general people in making handicrafts and other precise measurements