Torquing involves the process of measuring a force's tendency to produce rotation and torsion about a designated axis. Efficient functioning of a threaded fastener relies upon its objective to clamp parts together with a tension greater than any separating external force. Therefore, the bolt remains under near constant stress, with immunity to fatigue. The necessary tightening torque process is imperative to ensure there is correct initial tension.

Used for lifting from a surface upwards, jacks are designed for raising and lowering heavy loads, as well as for the application of great force. Industrial and construction jacks are composed from high strength, corrosion resistant materials to ensure reliable lift and operation, especially for high demand uses.

Manhattan Island is one of the five New York City Boroughs. Manhattan's utilities, electric, gas, steam, water, sewer, fiberoptic and communication cables are all underground and require specialized equipment to install and service these facilities.