1. this machine has 250mm long arm

2. Equipped with an extra large horizontal rotatinghook and bobbin for use with thick threads

3. Top and bottom feed mechanism with reverse stitchensures perfect and fine lockstitches on such thick materialsfrom 3mm to 12mm in thickness without any slippage of theupper and lower pieces of material .

4. Specially for extra heavy duty, such as thick leathertarpwulins, horse ruges , harnesses ,vehicle upholstery, shadesails, water-proof cloth cloth,travel bags, suit cases, thick clothand other bulky material.

Heavy duty top andbottom feed backstitch sewing machine (lengthening)