Liner or Shader - Both Multi-Purpose Machine Type - Rotary Machine Brand - Hummingbird Rotary Motor - Swiss Motor Frame Material - Aluminum Weight - 3 oz The Hummingbird rotary machine is made of aluminum which means better heat dissipation and lower operating temperature. This rotary uses a high velocity swiss made motor. Adjustable Stroke: It is capable of hitting at any stroke length from 2.6 mm up to 5.5 mm for lining or shading. Brass Needle Bar Stabilizer keeps your loop bar down. So say good bye to your rubber bands because this machine will not need it. Runs smoothly between 6-8 volts and has an RCA connection.