Designed to make tapping easier, Speedaire Hand Tappers from W.W. Grainger Inc. are ideal for general-purpose tapping. Safe and efficient, they eliminate time-wasting hand tapping. The tappers feature a pneumatic high-reversal-type motor with added torque that allows the tapper to handle a range of tap sizes. The tapping cycle starts at the correct speed and reverses instantly. A toolholder/" data-glossary-id="141671" data-glossary-teaser="Cutter holder that permits rapid tool changes. Generally associated with automatic or semiautomatic machining operations. See toolholder." title="Cutter holder that permits rapid tool changes. Generally associated with automatic or semiautomatic machining operations. See toolholder." aria-label="Glossary: quick-change toolholder">quick-change toolholder provides tap changing flexibility and accepts optional clutch type tap holders. The tappers have an ergonomic pistol grip and adjustable side handle. Two models are available: the #4WXT7 (150 rpm) and the #4WXT6 (250 rpm), which comes with a muffler.