CNC machined from a solid block of Pure Brass. Weight: 135g Powerful Japan motor- increased torque with less voltage. This machine could be used both shading, lining, large area coloring Stroke Length:2.5-4.2mm. 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