open wrench

open burning and open detonation (OBOD) (= open-pit)

T wrench / T-shaped wrench

open country / open ground

monkey wrench

socket wrench

adjustable screw wrench

adjusting nut wrench

adjusting wrench

angle wrench

chain grip wrench

cock wrench

double end wrench

hook spanner wrench

fuze wrench

wrench from the enemy

ball wrench hex driver

box wrench

prop wrench

quad wrench (with one-way bearings)

ratcheting box wrench

T-handle spark plug wrench with jointed socket and hexagonal opening

T-handle wrench with jointed hexagonal socket

T-handle wrench with jointed hexagonal socket with block system

T-handle wrench with jointed hexagonal sockets and block system

break-open

open arrest

open attack

open barrel sight

open boat

open column

open emplacement

open fire