ZJ-3 550 Watts can be exchange with Eastman 629 Model and ZJ-3 750 Watts with the Eastman 627 Model. concentrated lubrication, nest cutting and small curvature radius curvilinear cutting, low noise, stable running, easy operation and high efficiency. Automatic sharpening. Suitable for cutting cotton, wool, linen, silk, chemical fiber, sponge, leather, etc.