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Upgrade of Key / Upgrade of Key

Upgrade of Key

Have you been annoyed by taking along too many keys? This upgrade is to amazingly use one key to open four locks at a time. Just turn the part on the top of the key, four different locks will be opened up, which is absolutely handy.

University

Southwest Jiaotong University

Southwest Jiaotong University
Chengdu, China

Design

Southwest Jiaotong University

Southwest Jiaotong University
Chengdu, China

Wang Zhaofeng; Wang Chunqi; Jiang Wenling: Ma Chunming

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