Alternative form of flare-nut wrench

(engineering) An open spanner (wrench) to tighten fragile nuts, such as flare nuts, not accessible to a ring spanner (box end wrench) or box spanner (tube spanner).

(rare) Causing great pain, suffering, or agony; painful

Indicative of wrenching

plural of nut wrench

An instrument for fixing on nuts or removing them from screws.

plural of screw wrench

A tool for grasping the flat sides of the heads of large screws.

plural of smoke wrench

(slang) A blowtorch, usually an acetylene torch.