This high quality pneumatic drill tapping machine is for copper, iron, aluminium, steel, stainless steel, plastic, wood Gweike Pneumatic ... metal processing Air Power Tapping Machine Information: *Applicable Materials:Tapping for copper, iron, aluminum, steel, stainless steel, plastic and wood, ... of USA .Service and quality is worthy of trust. 1). For Taps: M3-M122). Speed: 400 RPM3). Torque: 36NM4). ...