throw a wrench in the works

The last-minute design change **threw a wrench in the works**.

Idiom Engineering

Meaning

to cause a problem that stops progress

The last-minute design change threw a wrench in the works.

to send something through the air with force using your hand

a tool used for gripping and turning nuts, bolts, or pipes

the physical or mental effort used to achieve something

a very strong expression of gratitude

at the peak of activity or progress

people with power or influence who can help you

exactly what is needed or wanted

to be confident and relaxed about who you are

to disrupt or complicate something