1. Through shaft : Lighter torque, faster response .
2. High quality components : The needle bar and the upper looper needle slide bar are diamond-blackened, which is durable and can sew thicker material.
3. Direct drive servo motor ：Direct drive servo motor makes start-stitching faster.
4. Pulling cylinder bracket assembly (F1-4KD) : Equipped with pulling cylinder bracket assembly makestape binding more smooth during sewing process.
5. Stitches display (F1-4KD) : Applicable to light-weight and medium-weight material tape binding sewing work, or trousers pocket sewing, etc. with beautiful stitches.
