Socket wrenches are widely used hand tools for easy tightening and loosening of common fasteners, typically nuts and bolts. They work in much the same way as standard spanners and wrenches, but their ratcheting design allows the user to apply torque more easily, with less strain and fatigue...
Wrenches are made in various shapes and sizes and are used for gripping, fastening, turning, tightening and loosening things like pipes, pipe fittings, nuts and bolts. There are basically two major kinds of wrenches: Pipe wrenches used in plumbing for gripping round (cylindrical) things.