monkey wrench
noun🔊/ˈmʌŋki rentʃ/
🔊/ˈmʌŋki rentʃ/
(British English also adjustable spanner, North American English also adjustable wrench)
Idioms a tool with a part that can be moved to hold and turn things of different widths 活动扳手 
Idioms
(throw) a (monkey) wrench in/into something (North American English)
(British English (throw) a spanner in the works)
(to cause) a delay or problem with something that somebody is planning or doing 破坏，阻挠（计划）