a used to stabilize the steel fitting on the end of the rubber brake line while you loosen the fitting on the hard line
Thumb-screw controlled wrench affording tight fit by varying pincher size.
a wrench that has an adjustable head to fit various sizes of nuts and bolts. Some adjustable wrenches feature a locking mechanism to prevent slippage.
Wrench with a pair of jaws, one of which is movable by means of a screw adjuster. The wrench can be made to fit different sized fasteners.