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In outdoor,its common that we sit on the uneven ground. Unstable stool may cause ankle to wrench, sprain the vertebra, and lead to other physical injuries.
RETRACTILE STOOL is a mountaineering stool with four screw legs. These adjustable legs can be lengthened or shortened by screwing the gripping part. It fits all kinds of roads or even the ramps, keeps the surface horizontal, and then protects our body from injuries.
Min Yi Lin, Rih Yan Li, Jhih Teng Ke