throw a spanner in the works

crescent spanner

An open-end adjustable spanner with a worm-drive thumbwheel. When the term adjustable spanner or adjustable wrench is used, this type (branded with any of many brands) is usually the type meant.

if it works, it works

if an action achieves its desired result, one should leave it at that; the outcome of an action is more important than the action itself

lock someone up and throw away the key

To lock someone up in prison indefinitely.

spanner in the works

Something that disrupts smooth operation or functioning.

stone's throw

A short distance, roughly equivalent to how far a person can throw a stone.

throw a bone to

To provide support or assistance to, especially in one particular way or to a limited extent; to make a concession to.

throw a fit

To become angry, enraged, or upset; to act or react with an outburst, as by shouting, swearing, etc.

throw a kiss

To kiss one's hand, then make a gesture as if one was throwing the kiss in a direction towards the recipient.