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This design aims for the problem that people encounter when using the needles. The innovation of the design is in materials, which makes rubber and cast iron—the two materials combine. This design not only retains the original characteristics of needles, but also improves the needles when using the inconvenience. First, the rubber can make the colors more easier to identify.Second, the rough surface of rubber can make the needles more easier to hold. What’s more, due to the highly elastic rubber material, the users can change the size of the eye of a needle easily so that lines can thread the eye of a needle simply.