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Crutch is an important assistive tool when people walking, climbing and so on. In addition to these function, the convenient crutch can also play the role of lighting and warning. what ‘s more it can help people find picking up things. Noctilucent powder in the crutches absorb sunlight during the day and release at night, thus it can be used for lighting and warning when people walking. AS people los needles, pins, pins, nails and so on, it can help people picking up them using the strong magnetic under the crutch. It is remarkably convenient and efficient.