Provides powerful grip by use of an eccentric knurled wheel. Ideal for removing stubborn or rusted studs. Capacity for 6.5mm-19mm (1/4"-3/4").

If the studs are really tight, this will get them out, but in doing so might mark the stud slightly. If this tool won't get them out, they won't be unscrewing and you'l be looking at cutting tools!