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ID or Inside Diameter is the inside dimension of a round pipe or tube


An impact is a repetitive force or strike that mimics the action of a hammer

Impact driver

An impact driver is a drill type that delivers a constant forward and rotational force to assist in driving a fastener

Improper fraction

An improper fraction is one in which the numerator is greater than the denominator, (ex 5/4).


Infrared is long wavelengths of radiation that transmits heat