This machine is greatly improved out of normal lockstitch sewing machine with its take-up-lever,rotary hook and feeding system.Can be applied with all kinds of sewing thread when cut the tension 15% down. Stable sewing,excellently low vibration,low nosie,and free of puckering.Suitable for sewing garments,fashiondress,childrens clothes;can be applied for heavy materials like leather,artificialleather,jeans cloth etc. KXC111-1 　* 　 4.2mm DB? #11 4000s.p.m. 31mm 6 13 33 28 370 653?242?50 KXC111-3 *　 　 4.2mm DB? #14 5500s.p.m. 31mm 6 13 33 28 370 653?242?50 KXC111-5 　 　 * 5mm DB? #22 3500s.p.m. 35mm 6 13 33 28 370 653?242?50