noun Something that a person uses while cheating (i.e., either literally or figuratively cheating).
noun An improvised breaker bar made from a length of pipe and a wrench (spanner), usually used to free screws, bolts, etc. that are difficult to remove with a ratchet or wrench alone.
noun Any of various auxiliary lenses added to the visor of a welding hood to improve visibility, such as by providing refractive correction for presbyopia or providing magnification (e.g., 2×, 5×, 10×).