The Chinese word for wrench is
扳手

bānshǒu

Chinese Definition

wrench
1. 扳手；扳钳；猛扭;扭伤
Components
扳
1. to pull; to turn
2. to win back
3. (literary, or in compounds) to debate; to dispute
4. (Quanzhou, &, Xiamen Hokkien) to grip something tightly
5. Alternative form of 攀 (to climb; to pull)
手
1. hand
2. expert; master
高手 - master
3. -ist; -er
歌手 - singer
4. convenient; handy; portable
手機 - mobile phone
手冊 - handbook
5. handwritten
6. (Min Nan) luck in gambling
7. (Mainland China Hokkien)
8. (Taiwanese Hokkien) hidden part (general)
9. (finance)
10. usage. In many varieties of Chinese south of the Yangtze River, 手 refers to the arm and hand collectively.