This machine could be used both shading, lining, large area coloring, Adjustable stroke Length: 1-4mm. Ergonomic, lightweight. Designed for use with standard and cartridge needles. This rotary machine have spring and armature bar set-up that ensure more Stable frequency, have stronger rebound. Re-engineered and Special frame for a smoother, quieter operation at a lower voltage without stalling ,Solid brass frame, coreless motor. Flexible Design, Comnination of motor machine and shrapnel machine, adjustable soft and hard feeling on work. Specifications: Weight: 88g Size: 70mm*57mm Adjustable Stroke: 1-4mm Working Voltage: 4-10V Speed: 10V/10000RPM Coreless Motor