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1. The Ratchet Wrench is designed with a direction shift mechanism to shift the action direction by the handle instinctively instead of the direction switch button. 2. An extension bar was designed to increase the length of handle to enhance hand strength if needed. 3. A T-bar or L-bar can be used to increase the operating moment by the hand strength. 4. A hand-shaped handle was designed to fit the shape of hands. 5. A 360° operation angle was designed for the left and right handed users.
King Tony Tools Co., Ltd.
WuJih Dist.,Taichung, Taiwan
National Yunlin University of Science and Technology
Douliu, Yunlin, Taiwan
Dengchuan Cai, Jhongpei Wu, Jyun-Cheng Cheng