Best for loosening tight bolts and nuts without effort. Even stubborn (frozen-jammed-corroded) bolts and nuts loosen in an easy and quick way. Tightens in the same easy way. Features: *Power input is increased up to 4 times. *Hand operated. *Compact design for work in close quarters Advantages: *No air or electric power is required. *Portable, can be used anyplace. *Easy to operate. *Can be used with 25.4 mm drive sockets from any manufacturer.