Single needle heavy duty compound feed lockstitch machine ( thick thread ) - The special extra large shuttle hook and bobbin capacity reduces the nhumber of bobbin changes and offer high efficiency. The compound feeding system enables you to sew multiple ply of heavy weight material with even stitch. suitable for sewing sofa, furniture upholstery, automotive upholstery, sails, parachutes, tents, covers, awnings, saddles, sisal buffing, wheels, denim buffing wheels, spiral sewn, cotton wheels, lifting slings & rigging products, safety belts, hoists, safety harness, japanese tatami, textile slings, lanyards, synthetic webbings, bulky quilting & beds etc.