1. Through shaft : Lighter torque, faster response .
2. Direct drive servo motor ：Direct drive servo motor makes start-stitching faster.
3. High quality components : The needle bar and the upper looper needle slide bar are diamond-blackened, which is durable and can sew thicker material.
4. Upper differential adjustment : Differential adjustment rocker, adding up and down adjustment screws,More convenient,simple and practical.
