A specialized socket wrench used to tune stringed instruments that have strings wrapped around tuning pins.

plural of hook wrench

plural of key wrench

plural of monkey-wrench

plural of tuning wrench

plural of wrench hammer

plural of ring wrench

(especially (US)) a wrench with a ring-shaped jaw with internal serrations which grip onto a nut or bolt.

(US) Synonym of spanner in the works

plural of wrench in the works