Bolts and nuts are widely used in industrial application areas such as in the open air, explosive, or corrosive environments. After long time serving, or due to poor working condition, some are rusted, threads were damaged, which makes removal or dismantling nuts and bolts difficult, even impossible. Usually we use (gas) or high temperature to nut off, but in the conditions mentioned above, and special gas were unavailable, and sometimes even fire and gas are prohibited, such as coal storage power plants, oil pipelines and other high-pressure high-temperature piping at the nuts and bolts. Ningbo Instruments Mechanics instrument hydraulic nut splitters do not require electricity, gas, no damage to the threaded bolts, simple, fast, safe, provide efficient solution to bolt and nut removal and replacements.