Features: Electric tapper, made with metal housing, durable rugged construction, compact, space-saving, convenient to anywhere. Pure copper motor core, careful-engineered, ensures good work, quiet run, stable performance, quick heat dissipating, fast speed. 7 rotation speed, adjustable, allows to change speed based on different target objects, flexible, easier, better. Strong output force, high accuracy, for efficient work, precise M3, M4, M5, M6 thread. Applicable materials: aluminium, copper, A3 steel, 45 steel, cast iron, 40Cr, stainless steel, nylon, wood and other materials.