Toggle Switches has the slider unit is in the shape of a ball that rolls in & out of position. This type of switches operates in a similar manner to a slide switch. Toggle switches are available in SPST, SPDT, DPST and DPDT versions. They are tending to be more durable and less susceptible to contamination from dirt and crud in the environment. Toggle switch requires a simple round hole for mounting. These switches are available with center off positions and with up to 4 poles switched simultaneously. Toggle switches are always break before makes. The direction of travel should be vertical and the `off' and `on' positions marked above and below. If a toggle switch with three positions is used, there should be at least 40 degree of travel between two adjoining positions, which should all be clearly identified. Toggle switches have a tapered handle, which is operated by flipping it with the fingers. The operation of a toggle switch should offer elastic resistance, that is, resistance that builds, then decreases as the contact position is approached.

Toluene is known as methylbenzene or phenylmethane. It is a clear, water-insoluble liquid with the typical smell of paint thinners, redolent of the sweet smell of the related compound benzene. It is an aromatic hydrocarbon, which is used as an industrial feedstock and as a solvent. Toluene reacts as a normal aromatic hydrocarbon towards electrophilic aromatic substitution. Toluene is used as an octane booster in gasoline fuels used in internal combustion engines. Toluene is used to break open red blood cells in order to extract hemoglobin in biochemistry experiments.