Bolt tensioners are devices designed to apply a specific tension to a bolt. The device may be either removed once the actual nut is threaded into place, or left in place, in the case of a hydraulic nut.
The metric system does away with all of the different units of volume used in the English system, and instead, uses only one unit to measure volume. That unit is called the liter. Materials Needed: Meter stick or metric ruler; stiff cardboard such as poster board; scissors or hobby knife; tape.
Quick Answer. The types of tools used by doctors in general include the stethoscope, thermometer, ophthalmoscope, sphygmomanometer, otoscope, reflex hammer and tongue depressor, according to the St. Louis Children's Hospital. Within medicine, different specialists rely on different sets of tools depending on the area of focus.