bulldog wrench(n = noun.artifact) - a wrench designed to provide a firm grip on something;
is a kind of spanner, wrench
adjustable wrench, allen wrench, alligator wrench, box end wrench, box wrench, brace wrench, bulldog, bulldog ant, bulldog clip, carriage wrench, chain wrench, crescent wrench, dog wrench, english bulldog, french bulldog, hook wrench, lug wrench, monkey wrench, open-end wrench, pin wrench, pipe wrench, s wrench, screw wrench, socket wrench, sparkplug wrench, stillson wrench, tap wrench, tappet wrench, torque wrench, tube wrench, wrench